Here is a collection of the words and terms you may hear and their definitions. If anyone can think of any more please let me know and I will add it in.
ADD ON
A trampoline game involving two or more players. Every player has to repeat all skills of those that went before in the correct order and "add on" and additional skill at the end.
ADOLPH
A front somersault with 3½ twists.
ARABIAN
A ½ twist into a front somersault (backwards take off).
BACK DROP
A ¼ back somersault (landing on back).
BACK IN, FULL OUT
A double back somersault with a full twist in the second somersault.
BACK PULLOVER
A ¾ back somersault from backdrop.
BALLOUT
A 1¼ front somersault from backdrop.
BARANI
A front somersault with 1/2 twist
BARANI BALLOUT
A 1¼ front somersault (from back landing) with ½ twist (i.e. barani from back drop).
BED
The landing surface of a trampoline.
BELT
A safety/spotting device used to help athletes learn new skills.
BLIND
When the ground is not seen until very late before landing.
BOUNCE ROLL
A front somersault from backdrop to back drop.
BUILD UPS
Easier skills used as progressions to learn a more difficult skill.
CAT TWIST
A backdrop, full twist to back drop.
CODY
A 1¼ back somersault starting from front drop.
COMPULSORY
A routine, which must include required skills in competition.
CORKSCREW
A back drop, 1½ twists to back drop (i.e. cradle with an extra full twist).
COWBOYING
When an athletes' knees are pulled apart during the tuck position to speed up rotation.
CRASH DIVE
A ¾ front somersault from feet to back drop.
CRADLE
A backdrop ½ twist to back drop (with 180 degrees forward rotation).
CRUISE
A front drop ½ twist to front drop (180 degrees backward rotation).
DEGREE OF DIFFICULTY (DD)
A rating that measures the difficulty of a specific move.
DOGGIE DROP (HKD)
A skill where the athlete lands on her/his hands and knees.
DONKEY JUMP
A skill, which starts from knee drop and then to a handstand.
DOUBLE BOUNCING
When one person lands just before another person (on the same trampoline) and sends the second person flying. Also known as "kipping".
DOUBLE FULL
A back somersault with two twists.
DOUBLE MINI TRAMPOLINE (DMT)
A rectangular trampoline. The athletes runs and mounts the first part of the DMT and performs a first skill, which lands on the second part of the DMT and then performs a second skill as the dismount.
END DECK
The safety mats located at the front and back of the trampoline.
FLIFFUS
Any front double somersault with twist.
FULL BACK
A back somersault with a full twist.
FULL IN, FULL OUT
A double back somersault with a full twist in each somersault.
GAINER
When travel occurs in the opposite direction to the rotation (e.g. traveling forward in a back somersault).
HALF AIRPLANE
A ½ twist to front drop (backwards take off).
HALF IN, HALF OUT
A double back somersault with ½ twist in each somersault.
HALF OUT
A double front somersault with ½ twist in the second somersault.
HALF IN, RUDY OUT
A double back somersault with ½ twist in the first somersault and 1½ twist in the second somersault.
HANDS AND KNEE DROP (HKD)
A skill where you land on your hands and knees (also known as a "doggie drop).
KABOOM
A somersault from backdrop, where a double contact is made. The legs hit the trampoline momentarily after the body, reversing the rotation generated from the body (can also be done frontward).
KICKOUT
Extension of the legs and hips to s straight body position after the shape phase of the somersault is completed.
KILL
To stop the recoil of the bed throwing the athlete up. The athlete bends her/his knees to absorb the bed of the trampoline.
KIP
Same as Double Bounce.
LAYOUT
Alternative name for straight body position.
MILLER
Triple twisting double back somersault.
MILLER PLUS
Quadruple twisting double back somersault.
OPTIONAL
Voluntary routine in competition.
OUT BOUNCE
Controlled straight bounce allowed after a competition routine.
PIKE
Position where the legs are straight and together and the body is bent at the hips between 90 - 135 degrees.
PIKE JUMP
Move showing the pike shape (no rotation or twist).
PIT
A safety mat, which is pushed under the athlete while she/he is in the air.
PUCK
A semi-tucked shaped used in multi-twisting, multiple somersaults. For competition an angle between the body & thighs and the thighs & lower legs of 90 - 120 degrees is required.
QUADRIFFIS
A quadruple front somersault with a ½ twist on the fourth somersault.
RANDY
A front somersault with 2½ twists. Also know as a Randolph.
ROLLER
A seat drop, full twist to seat drop.
ROUTINE
A sequence of ten moves linked together.
RUDY
A front somersault with 1½ twists.
RUDYOUT
A front double somersault with 1½ twists in the second somersault.
SHORT
When a move has a lack of rotation.
STRADDLE JUMP
A jump where the legs are split and straight (min. shoulder width apart and the upper body is forward at the hips at an angle > 45 degrees).
STRAIGHT
Body position where the legs are in line with the body. For competition, thighs must be greater than a 35 degree angle to body.
SWAN JUMP
A jump where the legs re straight and back is arched.
SWIVEL HIPS
A seat drop, 1/2 twist to seat drop.
SYNCHRO
Two people bouncing on separate, side-by-side, trampolines completing the same routines in time with each other.
THREE QUARTER BACK (3/4 back)
A move starting from feet, ¾ back somersault to front drop. Also known as a Lazy Back
TRAVEL
Movement along the trampoline bed during a skill.
TRICK
Alternative name for "skill" or "move".
TRIFFUS
A triple front somersault with twist.
TUCK
Body position with legs bent at the knees and hips.
TURGEON
A double back somersault with five twists.
TURNTABLE
A move starting on stomach, 360 degrees of side somersault landing again on stomach.
WRAP
Drawing the arms in close to the body to speed up the twist.
This glossary was sourced from http://www.skyriderstrampoline.com/