A particularly messy and stinky shit. Like the day after drinking lots of beer or after eating Mexican. But not soft enough nor painful enough to be diarrhea
"man, after downing those 18 bud lights last night, I had to drop the worst grease missile this morning"
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the USCoast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."