wii-off Share definition Flag 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! wii-off by M Boogie January 19, 2008 0 0 Get merch Get the wii-off mug. Buy Now — $32.95 See more merch