The narrow space between kitchen fixtures like abutting counter tops, or a fridge and a stove, into which food particles, detergent powder and grease blobs fall and form over the years a sticky layer of grunge.
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."