6 o'clock hot is where the temperature is so high, you can't do anything until 6:00pm in the evening - you just want to lay low and as close to air conditioning as possible!
Cedric The Entertainer often uses this expression to describe the Southern states of the USA.
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."