Top definition
A game in which players try to keep a styrofoam cup in the air. Mostly played by extremely bored teenagers.
Dude, we've got twenty minutes 'til class starts! Break out that cup and let's play some styro-slap!
by A Bored Teenager February 11, 2007
Get the mug
Get a Styro-Slap mug for your guy Beatrix.