When you decide to blow off all responsibilities on any given sunday including work or going home if you've been out of town partying all weekend. Very popular term used in the rugby community. Should always involve hanging out with members of the opposite sex and is even better when you actually have butt sex with one of them.
Skip: Well, should we head back to the twin cities, I have to work later.
Joe: Screw that, we're in Chi-town, it's Butt Sex Sunday, all day long.
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.