Mouse on a Trampoline 

The act of stretching one's scrotal skin and bouncing the penis repeatedly on it for a large audience, preferably unsuspecting churchgoers...or an elementary school.

The sermon was interrupted when a man stood and entertained the congregation for hours with his mouse on a trampoline.

Mouse on a Trampoline by Hi-Definition July 12, 2009

Poop trampoline 

When feces unexplainably ends up on the wall next to you.

There must have been some kind of miscue and the poop hit the mini "poop trampoline" that was lying on the floor in the bathroom.

Poop trampoline by kurupt2164 the greatest October 9, 2008

Russian Trampoline 

A sex game in which the 'server' inserts an ice cube into their asshole and then forcefully expels the projectile directly into their partner's mouth. The partner then returns fire, shooting the ice cube out of their mouth and back into the asshole. This back and forth volley continues until there is an unsuccessful ice cube reception, uncatchable pass, or the ice cube simply melts to the point it becomes unusable.

Made famous by the 2014 Sochi Olympic Village.

Guy 1: "Man, I came home last night and caught my roommate and his friend playing the damn Russian Trampoline again. I'm getting sick of this shit! There's never any ice left in the tray when I get home!"

Guy 2: "Don't knock it till you've tried it bro."

Russian Trampoline by Coolsexguy420boner February 23, 2014

The Trampoline 

Where you extend the foreskin of your nutsack to form a "trampoline" and you bounce your penis off it creating the effect of a trampoline.

Guy 1: Hey dude, check this out
Guy 2: Ohhhh man... wtf
Guy 3: THE TRAMPOLINE!

The Trampoline by Weak Saucer November 29, 2007

mormon trampoline party 

A party that involves Mormons and trampolines.

Sean's Mormon trampoline party was really fun.

Yes, those Mormons really know how to jump!

mormon trampoline party by ericstaunlich April 22, 2019

hedgehog on a trampoline 

It is a hedgehog on a trampoline
What did you expect?

Something nasty
Nope, just a regular ol' hedgehog on a trampoline.

Look Jesus Christ A hedgehog on a trampoline

hedgehog on a trampoline by Strawbert McCringlemilk November 22, 2017

Cream Trampoline 

A masturbation maneuver in which a nude male, isolated in a bathroom, jerks off standing up with his feet shoulder-width apart until ejaculation, at which point, while continuing to stroke himself with his cock pointed downwards, he suddenly squats so his thighs are parallel to the floor and bounces slightly at the knees until ejaculation. The pleasurable pain provided by the stretching of the leg muscles endured during orgasm is essential for a successful Cream Trampoline.

Bob hurt his back doing the Cream Trampoline last night.

Cream Trampoline by Denver Dudes March 29, 2011