We use all sorts of confusing terminology in trampolining. Many moves are named after the person first credited with performing them!

Here are some you’ll probably come across:

Adolph or Ady 3½ twisting front somersault
Airplane ½ twist to front drop (backwards take off)
Andi Roll Back pullover to back to bounce roll  (courtesy of Bideford Bouncers!)
Arabian ½ twist into front somersault, ie. backwards take off
Arabian crash dive ½ twist into crash dive straight
Baby fliffus From back landing, 1 1/4 front somersault to feet with early half twist
Back-in full-out Double back somersault with 1 twist in 2nd somersault phase
Back pullover 3/4 back somersault from back landing, usually to feet
Ball out 1 1/4 front somersault from back landing to feet
Barani Front somersault with ½ twist
Barani ball-out 1 1/4 front somersault (from back landing) with ½ twist to feet
Barani-in Double front somersault with ½ twist (in the first somersault phase).
Barani-out Double front somersault with ½ twist (in the second somersault phase).
Barrel roll Another name for side somersault
Bed The springy landing surface of a trampoline
Blind Move where the bed is not seen until very late before landing
Bluch From front drop, 180° backwards rotation with half twist, to land on front.
Bomb Back pullover from tucked seat drop position
Bounce roll Front somersault from back landing to back landing
Cast Sideways travel during a move
Cat twist Full twist from back landing to back landing (no somersault rotation)
Checking Stopping the bounce by bending the knees, ankles and hips
Cody Any somersault from front landing. Usually 1 1/4 back somersault from front, to feet; but (3/4) front cody is also possible
Corkscrew From back landing, 1½ twists to back drop (with 180° forward rotation); ie. cradle + 1 twist.
Corpse A flat back landing from toes to head
Cowboy or cowboying Pulling the knees apart during tuck shape to shorten radius of gyration and gain more rotation
Cradle From back landing, ½ twist to back drop (with 180° forward rotation)
Crash dive 3/4 front somersault from feet to back landing
Cruise Front drop half twist to front drop  (vertical axis rotation – NOT a turntable!)
Dolphin Bounce roll. Also, front somersault from seat drop position
Dorso-ventral axis Axis from stomach to back, around which the side somersault and turntable are done. 
Double bounce roll Double front somersault (720°) from back landing to back landing
Double full Single back somersault with 2 twists
Double bouncing Two people jumping on the same trampoline, usually asynchronously
Fliff or fliffus Any double somersault with twist.
Fliffus ball-out 2 1/4 front somersault from back with ½ twist in the last somersault phase. Also known as ½-out ball-out.
Free bounce A straight bounce when done in the middle of a routine
Forward turnover Front somersault from feet or hands & knees; usually from hands & knees to back or seat. But also, from feet, free body position to back
Full Single back somersault with 1 twist
Full-in Double back somersault with 1 twist in 1st somersault
Full-in full-out Double back somersault with 1 twist in both 360° phases
Full-in half-out Double front somersault with 1 twist in 1st somersault, ½ twist in 2nd somersault
Full-out Double back somersault with 1 twist in 2nd somersault
Gain Travel in the opposite direction to the rotation, e.g. travelling forwards in a back somersault
½-in Double front somersault with ½ twist in 1st somersault
½-in ½-out Double back somersault with ½ twist in each somersault phase
½-in rudi-out Double back somersault with ½ twist in 1st somersault and 1½ twists in 2nd somersault phase
½-out Double front somersault with ½ twist in 2nd somersault. (See barani-out)
½-out ball-out 2 1/4 front somersault from back with ½ twist in the last somersault phase. Also known as fliffus ball-out.
Kaboom Somersault from front (or back) landing, where a double contact is made. The legs hit the trampoline bed momentarily after the body, reversing the rotation generated from the body.
Kick out Extension of the legs to straight body position after the shape phase of a somersault is shown
Kip Coaching technique to augment the power of the trampoline bed by it being depressed momentarily before the performer’s landing
Lateral axis Axis going from side-side around which somersaults are done
Layout or lay Alternative term for the straight body position. e.g. layout somersault=straight back somersault
Line-out Good technique where performer neatly places arms beside body on kick-out of a shaped somersault, or whilst twisting
Log roll Full twist from front drop to front drop, ie. similar to cat twist but from the front
Longitudinal axis Axis from head through the body around which twisting is done
Miller Triple-twisting double back somersault.
Miller-plus  Four-twisting double back somersault
Optional Alternative name for the voluntary routine in a competition
Out bounce Controlled straight bounce allowed after a competition routine
Periwinkle 1 3/4 front somersault with full twist in the first somersault
Phasing The balance and timing of executing take-off, shape and landing of a move with good technique.
Pike Body position where legs are straight, together and the body is bent at the hips. For competition, minimum angle is 135° but 90° or less is considered good form.
Pike jump Move showing the pike shape alone, i.e.. no rotation or twist
Ping, pinging When a move (somersault) is done but takes off is not under control, usually travelling and losing height
Pirouette Old term for full twist jump
Porpoise Little-used alternate name for a bounce roll
Prerequisites Moves which are a requirement to be mastered before learning another move, for sound coaching reasons
Progressions Stages in learning a move, usually but not always moves in themselves. Some progressions are necessary but would never really be considered moves in their own right.
Puck Semi-tucked shape (piked tuck) allowable in competition for multi-twisting multiple somersaults. For competition, the rules require an angle between the body and thighs, and the thighs and lower legs, of 90°-120°
Quadriffis Any somersault with twist and 4x 360°=1440° of somersault rotation
Randolph, randy (Single) front somersault with 2½ twists
Randy ball out 1 1/4 front somersault from back to feet, with 2½ twists. Occasionally seen in competition.
RMI Twist Relative moment of inertia twist, aka mid-air twist. A technique where twist can be generated in mid air (i.e. without contact with the trampoline bed), due to coming out of a shape.
Roller Full twist from seat landing to seat landing. No rotation involved.
Routine Sequence of (usually) 10 moves linked together with no straight jumps between
Rudolph, rudi (rudy) (Single) front somersault with 1½ twists
Rudi ball out 1 1/4 front somersault from back to feet, with 1½ twists.
Salto Alternative term for somersault
Set Compulsory routine in competition
Short When a somersault has a lack of rotation, usually leads to a bad landing
Side somersault Somersault around the dorso-ventral axis
Skill Alternative term for a move
Somi Short for somersault
Spotting 1. Landing in the same place as taking off; keeping in the middle of the trampoline
2. Standing by the side (end) of the trampoline and guarding against falling off
Spotting deck End deck of a trampoline, attached to the frame
Spotting mat Push-in mat used by the coach to provide a softer landing while learning moves; also sometimes seen in competition for use if the competitor needs it
Spotting rig Overhead rig apparatus with a belt, ropes, pulleys and fittings allowing the coach to provide remote support for a move whilst learning.
Spotter Those who do ‘spotting’, ie. stand by the side (end) of the trampoline guarding against falling off
Straddle jump As pike jump, but with legs apart. For competition, minimum is shoulder width, but 90° or more is considered good form.
Straight Body position where legs are in line with body. For competition, thighs must be greater than 135° angle to body
Swingtime Moves done consecutively as in a routine
Swivel-hips From seat drop, ½ twist to seat drop
Synchro Two people jumping on separate trampolines in time with each other
Tariff Numerical score given to a move/routine based on the amount of rotation, twist, shape, etc.
Tilt Twist A method of mid-air twist where the body’s symmetry is changed during somersault (lateral) rotation, causing a difference in moments between the left and right sides, which results in a twist around the longitudinal (twisting) axis.
Travel Movement along the trampoline bed
Trial judging Judging done by the panel, guided by the superior judge, before a competition starts (usually during competitors warm-up), to set a consistent benchmark of judging
Trick Alternative, slang, name for ‘move’
Tuck Body position with legs bent at the knees and hips. For competition, both angles must be 135° or less. For good form, legs must be bent 90° or less and hands must grasp the legs below the knees.
Turntable From front landing, full twist around the dorso-ventral axis to land on front. Also half-turntable, where rotation is 180° around dorso-ventral axis.
Triffus, triff Any triple somersault with twist
Twister Generic term for a twisting single somersault, e.g. full, rudi, double full, randy, etc.
Vol Voluntary routine in competition (the performer’s choice of moves, and is awarded tariff score).
Wrap Drawing the arms in near the body to speed up the twist