Yo-Yo Glossary

[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]

	A Competition Division/Yo-yo Style focusing on traditional one-handed string tricks. In the absence of an X Division, often other styles involving one yo-yo may be used. Consult contest organizers for details. AA Competition Division/Yo-yo Style focusing on traditional two-handed looping tricks. In the absence of an X Division, often other styles involving two yo-yos may be used. Consult contest organizers for details. AAA Competition Division/Yo-yo Style focusing on String tricks using two yo-yos. Examples include Mach 10 and Velvet Rolls. AAAA Competition division more often referred to as OS (Off String). AAAAA Competition Division more often referred to as CW (CounterWeight) ABEC Standard for rating certain aspects of bearings. Not generally applicable in yo-yos. More information is available here. ALCB Commonly used abbreviation for the A-Line Cherry Bomb by Team Losi. ALDB Commonly used abbreviation for the A-Line Da Bomb by Team Losi. Alpha Style Yo-yo style where the next move or portion of a trick is begun before the preceding one is complete. Popularized by Doctor Popular. Examples include The Matrix and Skin the Gerbil. AP Competition division focusing on performacne skill rather than just pure yoyoing skill. Abbreviation for artisitic performance. ASG Adjustable String Gap; Abbreviation Playmaxx used for its Adjustable gap system. ATW Commonly used abbreviation for the trick Around the World. Auto Return Type of yo-yo that returns on its own when a sufficient amount of its spin has been exhausted. AYYA American Yo-Yo Association . The AYYA publishes a newsletter, maintains the official yo-yo world records, and sponsors the Yo-Yo Hall of Fame.
	BAC Bay Area Classic Backspin Utilizing the yo-yo when it is spinning in the opposite direction. A simple example would be to throw a sleeper then try to swing the yo-yo up into a trapeze. The yo-yo will be spinning backwards compared to a normal trapeze and will probably try winding up. Picture (Thanks to Jim Pankey and Bob Bowden) Ball Bearing Axle A type of yo-yo axle utilizing a ball bearing to enable yo-yos to sleep much longer than traditional fixed axle yo-yos. Ball bearing Component of ball bearing axle consisting of a inner and outer race which are separated by a series of small balls. The inner race is held stationary relative to the yo-yo (spinning with the yo-yo) and the outer race is held securely by the string. The string grips the outer race allowing the yo-yo to spin freely and for relatively long amounts of time.See picture here (with permission of Torrington, all rights reserved.) BC One of the yo-yo brands of What's Next Mfg., producers of wooden, fixed axle yo-yos such as the Rainbow and the Apollo. Bearing Yo-yo axle type using a ball bearing. Beefcake A yo-yo modification involving the addition of a second bearing on the axle of a ball bearing yo-yo. Bind Return Intentional insertion of extra string segments into the yo-yo gap (usually a wrap around the axle) in order to get an unresponsive yo-yo to return. Binds Yo-yo move involving an extra wrap of string around the axle. Mindbend, Jedi Mind Trick and Jedi Boingy-Boingy are examples. BPT Abbreviation for Brake Pad Technology Brake Pad Technology Playmaxx's term for their patented adhesive friction response system used in their Proyo branded ball bearing and brass transaxle yo-yos. Brake Pads Playmaxx/Proyo adhesive friction disks with the appearance of cork but actually made of recycled rubber. Bucket Style Type of tricks characterized by the formation of a bucket shape with the strings, with the yo-yo being moved into and out of the bucket.
	CB Abbreviation for Team Losi Cherry Bomb Centrifugal Clutch Mechanism which allows auto-return yo-yos to return. When the yo-yo slows down the clutch engages and the yo-yo winds back up. Ceramic Bearing The balls in a ceramic bearing are made from solid silicon nitride rather than metal. See this page for more information. CF Abbreviation for the Playmaxx (Duncan) Cold Fusion yo-yo. CFGT Abbreviation for the Playmaxx (Duncan) Cold Fusion GT yo-yo. Cherry Yoing style consisting of two yo-yos joined by one string with a floating counter weight in the middle.See also Hydra. Clip Video Long form yo-yo videos usually featuring several yoers or tricks. Often they are associated with various competitions or club meetings. Citadel of Sector Y is generally credited with popularizing this format in the online yo-yo community: Also Clip Vid. Combo Series of preexisting tricks or moves combined together. Short for combination. See Trick(s). Compulsories The list of tricks that all competitors in any particular competition division complete in order to see who qualifies for the freestyle portion of the competition. Some competitions have done away with compulsories, substituting invitation freestyles or choosing contestants through pre-contest video submissions. Other contest allow high finishers in other contests to automatically qualify for the freestyle but still count their compulsory points in totaling their final score. Counter Weight Weight used on the finger end of the string when doing Freehand Style tricks. Often a die or rubber ball. Custom Yo-yo company responsible for producing various aluminum yo-yos such as the Reactor, Chain Reactor, Axl, and Axl Elite. CW Competition division in which tricks are done with a yo-yo attached to a counter weight (rather than to ones finger). Abbreviation for counter weight. Sometimes referred to as AAAAA of 5A. See Freehand.
	Daves Term commonly used to represent the online yo-yo store Dave's Skill Toys DB Abbreviation for Team Losi Da Bomb yo-yo. DCS Duncan Crew Singapore Dead A yo-yo that has stopped spinning. Dif-Pad Adhesive friction add-ons with a rubber like surface; produced by Dif-e-yo. Dismount How you go about getting a spinning yo-yo off the string during a string trick. Examples include back off, fly away, ferris wheel, and unravel. Double Loop(ed) When stringing a yo-yo, the loop of string goes around the axle of the yo-yo two times, preventing the axle from moving freely inside the loop. A fixed axle yo-yos cannot sleep if it is double looped. Double looping makes transaxle yo-yos more responsive. Drop Yo-yo move where the yo-yo is caused to flip over and then drop down to another lower string.See Flop. Duncan Long existing yo-yo producer, now a part of Flambeau. Producer of the Duncan Freehand, Avenger, Ballistic, and the classic fixed axle Imperial® and Butterfly®.
	ES Abbreviation for the online yo-yo store ExtremeSpin. EX Abbreviation for the Buzz-On Industries Element X. Extinction Letting a yo-yo sleep until it completely ceases to spin and loses its gyroscopic stability (allowing it to tip, tilt, or twirl). World Sleep records are timed to extinction. Extromanual Yoing Using objects besides your own hands and body while yoing. Examples could be rings, chairs, stair rails.
	FH Abbreviation for Duncan Freehand yo-yo. FH2 Abbreviation sometimes used for the second generation Freehand yo-yo from Duncan. Fixed axle Type of yo-yo where the axle is fixed (unmoving) to and spins with the yo-yo. The fixed axle spins in the loop of string while sleeping. Flipover When a trapeze is missed, one can do a flipover in order to get the yo-yo into the correct trapeze position. Some competitions allow flipovers to count in some of their divisions. Flop Yo-yo move where the yo-yo is placed in a bind and then is flipped over back onto the single string. Gyroscopic Flop is one example. See Drop. Free Generation Yo-yo move involving stopping and restarting a yo-yos spin while in the middle of a trick. Popularized by Johnnie DelValle. Also called FreeGen for short. FreeGen Short form for Free Generation. Also a termfor regenerations done while Freehand/counterweight yoing. Free hand When describing tricks the term free hand is used to indicate the hand not connected to the yo-yo. Works for both left and right handed yoers. See Throw hand. Freehand Patented style of yoing popularized by Steve Brown where the yo-yo string is not attached to your finger. Instead the finger end of the string is attached to a counter weight such as a die or small rubber ball. Also a yo-yo by Duncan. Freestyle A short (usually 3 minutes) yo-yo routine set to music and scored by judges a part of a yo-yo competition. Friction Biscuits Duncan rubber adhesive friction disks used in Freehand yo-yo as well as the Spintastics Great White and Eclipse. Friction Discs Another term for the Duncan Friction biscuits. Also a generic term for all adhesive friction add-ons, such as the turbo disk, performance ring, Dif-Pad, and brake pad. Friction Sticker Another generic term for all adhesive friction add-ons, such as the turbo disk, performance ring, Dif-Pad, and brake pad. Frontstyle Yo-yo style of one handed string tricks begun with a sleeper type throw. Opposite of Sidestyle. FS Abbreviation for Freestyle.
	Gap Space between the inside of the two halves of a yo-yo. Also called the string gap. Gap Adjustment Methods for changing the width of the gap on a yo-yo. Some methods of gap adjustment include click adjustable (Mondial) and twist adjustable (Viper). Not all yo-yos have an adjustable gap. Go West Yoing style featuring the use of a giant loop of string unwound all the way to the finger knot. Similar to Sumo but differs in the presence of the finger knot. First popularized by Taka. Grind When a yoer touches a sleeping yo-yo to a surface(including their own body). Gyroscopic Stability Principle which states that a spinning object resists changes to its axis of rotation. It is this principle which keeps a spinning yo-yo upright and stable.
	Henrys German yo-yo company that produces the Viper, Lizard, Cobra, Tiger Snake and Coral Snake yo-yos. Hesitate Sometimes used as a synonym for sleep. Hop Yo-yo move where the yo-yo is tossed or "popped" into the air and then caught again still spinning in the same mount. Eli Hops are an example of a trick with hops. See also Pop. Hub Inner portion of a yo-yo half that is made up of an inner and outer part. The metal part of a Viper or Coral Snake half. Hug In a sidestyle trick to move the throw hand to the other side of the mount and turn slightly so you are in a frontstyle position. HW Abbreviation for the Yomega Hyper Warp yo-yo. HWHW Abbreviation for the Yomega Hyper Warp Heavy Wing yo-yo. HWW Abbreviation for the Yomega Hyper Warp Wing yo-yo. Hydra Yoing style involving the use of two yo-yos attached together at opposite ends of one string. See also Cherry
	II Abbreviation for the online yo-yo store Infinite Illusions Insomnia Style of tricks done with a yo-yo that is not sleeping.
	Jam String YoYoJam six strand combination string. Similar to Slick 6. Judge An individual judging compulsories or freestyles at a yo-yo contest. Usually 3 or more judges are used to judge the freestyles.
	KonKave Special bearing from Dif-E-Yo with a concave string surface. KK Abbvreviation for KonKave. Used as an adjective (KK Bearing) and a verb (to KK a bearing or yo-yo).
	Laceration Yo-yo move involving pulling a sleeping yo-yo upwards, whipping the string around the yo-yo several times and landing in a mount without the yo-yo returning. Landing Successfully completing a trick. Liquid Template Method of dyeing yo-yos or parts of yo-yos involving using a mask such as glue (hard mask) or liquid dishwashing detergent (soft mask) and submerging in dye. Named by Doctor Popular and further refined by Scarecrow. Looping Style of trick that involves keeping the yo-yo moving in loops inside or outside your hand. Loops are a regeneration of spin energy. Lube Yo-yo slang for lubrication. A lube is a viscous substance added to a bearing or other transaxle to increase the level of responsiveness of a yo-yo. Lubing The act of adding lube.
	MAR 1. Mid-Atlantic Regional; 2. Mid-America Regional MER Mid-East Regional. Mod Yo-yo slang for modification. A material change to a manufactured yo-yo in order to alter its playing characteristics. Modding The act of applying a mod to a yo-yo. Modern Yo-Yo shape involving a relatively slim line and a somewhat open gap. An all around shape suitable for both loping and string tricks. Examples include the Henrys Coral Snake, the Duncan Proyo, and the Spintastics Technic. Modified Yo-yo shape; synonymous with Modern. Moebius Yo-yo style involving performing tricks inside the widely opened up finger loop. MOTFT Abbreviation for Man on the Flying Trapeze. Mount (1) The process of getting a spinning yo-yo onto a segment of string as a part of a string trick. Mount (2) The position that the yo-yo, string segments and the yoer 's fingers are in once the spinning yo-yo has been placed on a segment of string as a part of a string trick. Examples include over, under, front, pinwheel, split-bottom, 1 and 1/2, hydrogen bomb, and wrist. MSF Abbreviation for the YoYoJam Mega SpinFaktor. MSF2 Abbreviation for the YoYoJam Mega SpinFaktor 2. Mutation When the string doesn't wrap cleanly in trick holds. Examples include an extra wrap around the finger or a cross in the string where the yo-yo comes onto a string segment on the "wrong" side. See pg. 49 in the Yonomicon for illustrations and better examples.
	National Champions Winners of the National Yo-Yo Contest. National Master One of several individuals named for their contributions to yo-yoing. The current National Masters are Jennifer Baybrook, Steve Brown, Dave Schulte, and Rick Wyatt. Takahiko Hasegawa has been named National Master of Japan. National Grandmaster One of several individuals named for their contributions to yo-yoing. Consisting of previously named National Masters. The current National Grandmasters are Bill BeBoisblanc, Dennis McBride, Dale Myrberg, and Dale Oliver. National Yo-Yo Contest Yo-Yo Contest which crowns the United States National Champions in various divisions. Held annually in Chico, California on the first Saturday of October. National Yo-Yo Day June 6, in recognition of Don Duncan's birthday. National Yo-Yo League Organization representing the regional contests. National Yo-Yo Museum Yo-Yo museum located inside Bird in Hand in Chico, California. Nats Term commonly used to represent the National Yo-Yo Contest. NER Northeast Regional NM Abbreviation for the YoYoJam NightMoves. NM2 Abbreviation for the YoYoJam Night Moves 2. NT Commonly used webboard shorthand for "No Text", meaning that the entire message is in the subject line and that there is nothing actually in the body of the message. NWR Northwest Regional NYYL National Yo-Yo League NYYR Commonly used Yo-Yo webboard shorthand for "Not Yo-Yo Related".
	Offstring Yo-yo style where the string is not connected to the yo-yo. Sometimes referred to as AAAA or 4A. One-handed A misnomer since it really means one yo-yo. Doing tricks with just one yo-yo. A division. See A. O-Ring Rubber rings used in varieties of ways in yo-yos. For weighting (Eclipse, Freehand), cushioning (Lizard, Original Spinfaktor), gap spacing and adjustment (Tigershark, Viper) and response (Matrixx, Mega Spinfaktor 2). Organic Yo-yo dyeing technique created by Eric Wolfe. OS Competition division in which tricks are done with a yo-yo and string which are not connected together. Abbreviation for Offstring. See AAAA and Offstring.
	Performance Rings Adhesive friction add on pad from Custom Yo-Yo. Made from material like Rubbermaid tub treads. Picture tricks Style of tricks that involve manipulating the string into shapes that resemble things. Eiffel Tower is one example of a picture trick. Playmaxx Yo-yo company started by Donald Duncan, Jr. Recently purchased by Duncan from Tom Van Dan Elzen. Pog Paper or plastic removable cap printed with words or artwork used on the sides of some yo-yos. Pop Yo-yo move where the yo-yo is tossed or "popped" into the air and then caught again still spinning in a different mount. See also Hop. Pop-Up Tricks Style of tricks which involve popping the yo-yo up into the air and catching it again on the string with the yo-yo still spinning. Examples include Pop 'n Fresh and Kwyjibo. Proyo Brand name used by Playmaxx for its line of yo-yos. PYII Abbreviation for Proyo II

	Regeneration An action which imparts spin without catching and throwing the yo-yo again. (Thanks Dick Stohr and Shawn Fumo) Regens Yo-yo slang for regenerations Response(iveness) Term used when referring to how easy it is to get a yo-yo yo return. A very responsive yo-yo returns quickly and without much effort. Response System What type of yo-yo technology makes a transaxle yo-yo returrn. Examples include starbursts, lubing, brake pads, turbo disks, performance rings, friction disks or stickers, and Yo-Rings. Rim Outside edge of a yo-yo half. Rim Weight Weight added to the edge (rim) of yo-yo or a reflection of the difference in the weight distribution between the rim and the center of the yo-yo halves. Generally higher percentages of rim weighting versus center weighing creates faster spins, longer sleeper and more stability in regards to tipping or flipping. Roll Yo-Yo move where the yoer's hands move in a repeatable, circular direction either forwards or backwards within a mount. Barrel Rolls are an example of a roll. Roller Bearing Type of bearing that uses cylinders instead of balls between the races. No yo-yo actually uses roller bearings though some erroneously purport to.See picture here. (with permission of Torrington, all rights reserved.) Royal Yo-yo company producing replicas of classic collectible yo-yos. Russell Yo-yo company
	SB2 Abbreviation for Silver Bullet 2 yo-yo from Tom Kuhn. Seg Yo-yo slang for string segment. SER Abbreviation for Southeast Regional SF Abbreviation for the SpinFaktor yo-yo from YoYoJam. SF2 Abbreviation for the SpinFaktor 2 yo-yo from YoYoJam Shell Rubber wings on Vipers and Cobras. Shim Small washer or spacer used to increase the width of a yo-yo gap. Shimming The process of using a shim to widen a yo-yo gap. SW2 Abbreviation for the YoYoJam ShockWave 2. SW3 Abbreviation for the YoYoJam Shockwave 3. Sidecap Removable piece on the side of a yo-yo, usually printed with words or graphics. Single Loop(ed) When stringing a yo-yo, the loop of string only goes around the axle one time, allowing the axle to move freely inside the loop on a fixed axle yo-yo. In order to sleep fixed axle yo-yos must be single looped. Sidestyle Yo-yo style of one handed string tricks begun with a trapeze type throw. Opposite of frontstyle. Slack Style of trick where the yo-yo is moved into and out of loops made of loosely held portions of the yo-yo string. Sleep(ing) A yo-yo is said to be sleeping when it is spinning at the end of the string and not in the process of being thrown or in the process of returning to the hand. Slick 6 A very popular six strand cotton/poly string. Slick 8 Eight strand combination string. Slings A yo-yo move where the yo-yo rotates around ones finger in a number of circles. Singapore Sling and Cold Fusion have Slings in them. Also carrying bag from Yomega. Slimline A subset of yo-yo shape where the gap is not as wide as normal. This allows for increased ability to loop but still allowing a wide gap. Examples include the X-Games. Slip Knot Type of knot used to make a small loop on the end of the yo-yo string that tightens securely on the yoer's finger. Snap Wind Winding up your yo-yo by snapping or flicking your fingers rather than manually winding it around and around. Soloham Yo-yo style involving tricks done with two offstring yo-yos. Somersault Yo-yo move where pushing your fingers into or pulling your fingers against the collected strings causes the move in an arc forward or backward eventually coming to rest in the same position as before, but often with an additional wrap of string around your finger. Sour Side When the yo-yo rides on the string against the direction or grain of the string wind it is said to be on the sour side. Credit to Spintastics and Shawn Fumo's Guide to Looping. Please see those sites for more information on this very complicated subject. SP3 Abbreviation for the Stunt Pilot 3 by Playmaxx. Spacer Small specially shaped piece of metal or plastic placed on each side of a yo-yo bearing in order to hold the inner race fixed and allow the outer race to revolve freely. Picture (thanks to Jim Pankey). Speed Rings Rubber rings included with Team Losi yo-yos to insert in groves in those yo-yos to increase rim weight. Speed String Fornerly the term for Team Losi's Combination string, similar to Slick 6. Also generic term for combination string. Spintastics Yo-yo company; maker of the Tiger Shark, Technic, Tornado, and Great White. Stall Slight hesitation at the end of a forward pass or loop before the yo-yo returns. Stalls Looping trick, where after a throwdown, as the yo-yo returns to your hand instead of catching it you let it touch your hand as you throw it into a forward pass; as it returns to your hand let it touch again and hop it down into a throwdown again and repeat. Creates the appearance of the yo-yo hovering for a moment.Also incorporated into Shoot the Moon Stalls.(thanks to Shawn Fumo.) Starbursts Raised lines on the interior surface of a yo-yo half for the purpose of increasing friction so that yo-yos will be suitably responsive. Renegades and the various Team Losi yo-yos are among the yo-yos that use starbursts. String Long, thin, twisted piece of cotton or similar material which serves to connect the yo-yo to the yoers finger. String Segment A piece or segment of string between two corners. String Tension The tightness or looseness in the twist of the string. You will often see people throwing UFOs or Lariats in order to adjust their string tension prior to certain tricks. String Tricks Tricks done by manipulating strings and the position of the yo-yo while the yo-yo continues to spin or sleep. String Twist Method Technique used for setting world sleep records where the yoer holds the yo-yo just inches above the yo-yo and at eye level and makes minute adjustments to the twist of the string to keep the yo-yo spinning in the middle of the gap. SSCB Abbreviation for the Silver Series Cherry Bomb from Team Losi. SSDB Abbreviation for the Silver Series Da Bomb from Team Losi. SSF Abbreviation for the Super SpinFaktor from YoYoJam. Suicide Yo-yo move where a loop of string is released, swung in an orbit, and then caught again. Sumo From Super Moebius. Yoing style created by Doctor Popular which consists of yoing in a giant loop of string without finger loops. Similar to Go West. See also Moebius. SuperYo Yo-yo company responsible for the Typhoon, Sonic Spin, and Renegade among others. SW2 Abbreviation for the YoYoJam Shockwave 2. SW3 Abbreviation for the YoYoJam Shockwave 3. Sweet Side When the yo-yo rides on the string with the direction or grain of the string wind it is said to be on the sour side. Credit to Spintastics and Shawn Fumo's Guide to Looping. Please see those sites for more information on this very complicated subject. SWR Abbreviation for Southwest Regional
	TBB Abbreviation for the Turbo Bumble Bee from Playmaxx. TBBGT Abbreviation for the Turbo Bumble Bee GT from Playmaxx. Team Losi Yo-yo company; makers of the Cherry Bomb, Da Bomb and the Silver Series and A-Line series of yo-yos. TFY Standing for Throw-Free-Hold, TFY is a notation system for describing yo-yo tricks. The procedure was created by Mark McBride and set forth in his book The Yonomicon. THP Abbreviation for Team High Performance. Throw hand When describing tricks the term throwhand is used to indicate the hand that is connected to the yo-yo. Works for both left and right handed yoers. See Free hand. TL Abbreviation for Team Losi. Transaxle Yo-yo axle that has outer and inner parts which move independently. The outer part is actually the transaxle which spins around the inner axle. The string then hugs or grips the outer part. These transaxles are made of various materials as well (brass, nylon, Teflon). Ball Bearing yo-yos are a kind of transaxle which uses ball bearings. Transitionals Yo-yos created when production moves from one color of plastic to another. Transitionals may have color characteristics of both the new and old color as well as blends of the two. Proyo, Duncan and SuperYo have released transitionals in recent years. trap(ping) Catching the yo-yo against your body at the end of a trick. A trap will prevent a trick from being counted as successful during competitions. Trick(s) Series of yo-yo moves combined together in an original way. See Combo. Trick Ladder Type of competition where competitors work through a list of tricks in a prescribed order. Generally winners are ranked by how far through the list they get with no, or one miss. Specific rules differ by competition. Tub Strips Adhesive strips made of rough, bumpy rubber which Rubbermaid markets to use in bathtubs to prevent people from falling in the slipper tubs. Cut into rings they have been used to increase friction in various yo-yo modifications. Turbo Disks Thin, adhesive, cloth rings used in Tom Kuhn yo-yos to provide increased friction and thereby response in their ball bearing yo-yos. Two-handed A misnomer since it really means two yo-yos. Doing tricks with two yo-yos simultaneously. AA division. Type 6 string Yo-yo string consisting of six separate strands.See String Comparison for more information. Type 8 string Yo-yo string consisting of eight separate strands.See String Comparison for more information.
	Underpass Yo-yo move where the yoer pulls a segment of string from one side of a mount under the yo-yo to the other side.

	Weight Rings Rings of various materials added to the rims of yo-yos in order to increase the ratio of rim to center weighting. Whip Yo-yo move where a loop of string is whipped quickly around to catch a moving yo-yo. Wind Wrapping the string around the axle of the yo-yo so that it is prepared to be thrown. World Champions Winners of various divisions at the World Yo-Yo Contest. World Yo-Yo Contest Yo-yo competition which crowns the world champions in various divisions. Held annually in late July/early August. Worlds Term commonly used to represent the World Yo-Yo Contest. Wraps Subset of moves where while looping or or doing other moves the string is wrapped around various parts of the body.
	X Division Yo-yo competition division which encompasses all styles except traditional one hand (A) and two hand (AA) styles. Examples include AAA, freehand, offstring, and Moebius.
	Y3A Yomega Yo-Yo Association; also Yomega's yearly world contest. Yomega Yo-yo company which produces the Brain, Raider, Hyper Warp, and Rev-Rim yo-yos as well as other models. Yonomicon Groundbreaking yo-yo book by Mark McBride which presents theories on how to transcribe and learn tricks. Yo-Ring Patent pending response system from YoYoJam, consisting of rubber o-rings recessed into the inside of the yo-yo halves. YoYoJam Yo-yo company which produces the Shockwave, the Mega Spinfaktor, Nightmoves and the Hitman as well as other models. YYJ Abbreviation for YoYoJam