1. An uninvited and somewhat hostile take-over of your Wii video game by a friend or house guest. 2. A person who weasles or tricks you into letting them play your Wii game while you are in the midst of playing it and totally takes it over.
"I know I was having a rough time with that level of 'Super Smash Bros' that's when Shawn took the controller away from me and finished it off - what a Wii-zle!"
"Dude! Shawn totally Wii-zled you out of that Super Smash Bros. game!"