The act of masterbation while watching a reflection of yourself preform the act. Most commonly this is purpotrated in a hotel room in front of a mirror.
*door opens*
Connor: So Craig what are you doing in...OH MY GOD! WHAT THE HELL?
Craig: I was, eh, um, er...
Connor: YOU WERE WANKING OFF TO YOUR OWN REFLECTION!
Craig: I was just...er...
Connor: That was a Valkenburg Mirror you sick...I MEAN FOR FUCKS SAKE WHAT YOU WERE THINKING?!
Craig: Um...
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.