During a cold, winter night, you proceed to take a dump on a companions face.
"Man, we went up to the cabin for the winter and the heat went out. I had to give Tommy a Charleston Steamer to prevent any frost bite from setting in on his face."
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."