In game theory (and economic theory) a zero-sum game is a situation where one persons (or entities) gain has a corresponding loss from another person (or entity).
Initech employee 1: "Hey, everyone took big pieces of the cake now Milton doesn't have one."
Initech employee 2: "Cake is a zero sum game, man."
First Person: Hey look at this funny cat video
SecondP: OMG this cat is awesome
ThirdP: Is this meme zero?
FirstP: No, this is photoshopped in, meme zero is from a youtube video
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.