Paper currency (usually benjamins) stored in a cowboyboot in the back of one's closet in attempt to avoid scrutiny from a significant other or spouse. This money is usually reserved for questionable activities that require heightened discretion.
setting: two guys walk into a strip club
Guy 1 (handed a wad of cash by Guy 2): No way I can accept five hundred dollars in cash Guy 2: Don't worry about it, dude, this is boot money
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."
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.