Losing control of your penis during masturbation, causing it to slip out of your hands and enter your tightcornhole. While the skin flute is jammed in the ring, it is now impossible to remove. Cutting it off is your only solution, usually leading to death.
To fumble the biscuit is to lose the money (the biscuit) you made or to make unwise investments with the money you already have, i.e. the biscuit. It's also used for fumbling, or botching or bungling, something more generally
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.