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.
Jess: dude, you wanna gp?
Isabelle: Nah man, i gotta let it brew.
when two or more people take poops at the same time in the same bathroom in stalls situated next to each other so they can have a conversation while pooping
Gr-oop p-ewp, verb, noun A prank which entails three or more members who partake in consecutive poops in the same toilet without using toilet paper. The toilet is not flushed, leaving the owner (or next user) of the toilet to view the mountain of poop.
#1 (verb)
Guys 1,2,3: Wanna do a group poop in the girl's toilet?
Guy 4: Nah man, that's gross!
#2 (noun)
Girl(s)- WTF, the guys did another group poop in our toilet!!!!