1 definition by jsteww
When two or more people poop at the same time in the same restroom, preferably including conversation. Also, the phrase, "You sunk my battleship!" should be shouted when a portion of feces falls.
Also referred to as GP.
Also referred to as GP.
Jess: dude, you wanna gp?
Isabelle: Nah man, i gotta let it brew.
Ray: You sunk my battleship!
Zach: Another successful Group Poop.
Isabelle: Nah man, i gotta let it brew.
Ray: You sunk my battleship!
Zach: Another successful Group Poop.
by jsteww March 22, 2010