The part of your shirt that's stretched out between the gap in your boobs.

The act of forcing a man's penis into a woman's inner cheek lining. As the cheek reaches it's maximum extension it bounces back

A male sits on the roof of a one story house while receiving oral sex from a female jumping on a trampoline. When a female trampolines 10 males she receives a bracelet. Alas, the silly band was formed.

The process of fingering a girl when she still has her panties on. You would push on the outside of the panties, pushing them into the womens vagina. It is in-titled the Trampoline because the panties push back just like a trampoline would. Trampolining a girl is not consider a good thing, and you should make fun of a friend if that is all he/she has done, however it is better then getting nothing.

(n.) A term used to refer to an ass that a person would want to 'jump all over'.

When you're prairie doggin' it and the shit hits you're underwear and you pull it back in.

A bitch that wont stop trying to steal yo man. She keeps bouncing (flirting) on him