When two gay guys have been ramming each other in the ass all night and sipping pink mimosas with roofies; they each take turns covering a slip and slide with their loosened shit. They let it ferment for about a week in the middle of a Texas summer and take one of the state's many quadriplegic retards and slide said retard through slide over and over again until retard is either dead, or more retarded and Christopher Reeve'd than before.
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."