When you are sitting in the stall of a public bathroom and somebody walks in, prohibiting you from pooping, as you previously were or might have been about to.
Yo I was about to drop a serious deuce, when some bitch walked in and dump stumped me.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."