When you hit the public restroom, prior to a long engagement (such as a concert, ballgame, or plane ride), to avoid painful need to urinate, many hours into the event
Be right there, playa! Gonna pre-pee before the big meeting, yo!
Primarily for movie goers, the pre-pee is when one goes to the bathroom before getting the movie starts, in order to avoid having to go to the bathroom in the middle of a movie and miss a good part.
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."