undercover trampoline

The act of stretching one's scrotal skin out with two hands - using thumb and forefinger - parallel to a primary surface (i.e. a bed or floor) until smooth, with the penis resting on top, utilizing the grip and taut skin to move the scrotum up and down at various speeds to have the penis bounce off of it continuously.

I’m going to go home and play undercover trampoline

by MyNutsRSweaty January 23, 2019

Trampoline roof

A car roof that has been bent downward from children bouncing on it.

I've had to lower the price of my car on craigslist since the kids gave it trampoline roof.

by pingvuiini August 22, 2013

Trampoline Stamp

A tramp stamp above an ass that bounces when slapped.

Kasey had a booty so fat that her tramp stamp turned into a trampoline stamp

by Bophadeus September 27, 2021

Trampoline headbutt

What somebody under 5 foot does to somebody.

The guy/girl had to trampoline headbutt that dude.

by Solid Mantis July 08, 2020

Trampoline headbutt

What somebody under 5 foot does to somebody.

Trampoline headbutt coming at ya!

by Solid Mantis July 08, 2020

The Bad Kind of Trampolining

This unused and long term is used for when a NSFW video / gif or a normal video / gif is cropped to where someone "trampolining" looks like the person or thing is getting railed by something or someone.

Ben: Look at this anime character trampoline .
Jerome: Hm, that looks wrong.
Avery: Oh what the fuck, that's The Bad Kind of Trampolining.

by DumbassOofGuy April 07, 2021

Trampoline Place

The only location on planet earth where they can play the shittiest music possible and get away with it

Friend: Dude.. this music sucks..
Me: We’re at a trampoline place, the music isn’t supposed to be good..

by WutangInvictus January 30, 2019