1. A wii-off is when your super-cool friend brings her wii to your house and you have an epic gaming competition.

2. Archaic. A pissing contest.
Let's have a wii-off after work tonight!
by M Boogie January 18, 2008
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The motions you make when playing the wii.
I caught my boyfriend with his wiimote and he was wii-ing off.
by -The Brute- August 26, 2007
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