1 definition by Cpt. MC
A competition that occurs at parties where multiple guys preform oral sex on a girl who afterward chooses a winner based on who she believes preformed the best. This act is done in public in front of the rest of the party.
Kelly: I'm bored, let's have a box off.
Ben: I'm so down for the box off.
Kevin: BOX OFF everybody, there's gonna be a box off!!
Ben: I'm so down for the box off.
Kevin: BOX OFF everybody, there's gonna be a box off!!
by Cpt. MC October 15, 2008