The practice of pretending to play the drums with one's erect penis on someone elses stomach. No chicks allowed!
At any given moment the boys at CFM are a bottle of chardonnay away from a game of tummy sticks breaking out.
by Charlie Big Potato February 1, 2008

A tummy-sleeper is a guy who sleeps on his belly when he's in a gay bath-house room and he wants other dudes to know that he wants to be fucked in his asshole or rimmed.
by USAF Cadet September 2, 2021

The stomach of a girl who has obviously had children and who's tummy is now ravaged by stretch marks. The lines of stretch marks on her stomach resemble the stripes of a Tiger.
"dang, since that chick popped out that kid she has a bad case of tiger tummy. Her stomach looks like a popped balloon!"
by Josh Poysnick July 10, 2007

When you tuck your dick up into your waistband, go to hug someone, and urinate all over yourself and them
by Stara69 August 29, 2017

Dude, check out that girls happy trail!
That's not a happy trial. That's a muff tummy. You can tell because it grows all the way to her butt.
That's not a happy trial. That's a muff tummy. You can tell because it grows all the way to her butt.
by BOLT_GANG December 18, 2015

by Erotic King March 19, 2020

Occurs as a result of one housing or overeating over the course of a meal, day, weekend, or in rare cases an entire week. Known symptoms of tummy yucks include but are not limited to: bubble guts, gas (ranging from gross to indescribably bad), upset stomach, diarrhea, etc
by Tummy yucks October 5, 2022
