Definitions by uSeR315

gp 

group poop. when a large group of people go to the bathroom & takes a shit at the same time. often, texting, magazine reading and talking are done while gp-ing.
(under the stall fist-bumps are also common)

Person 1: yo, wanna gp?
Person 2: let's do it man.

gp by uSeR315 June 12, 2011