1 definition by thatpersonwiththeface.

When someone has one arm that is built up a lot more than another arm, most of the time their dominant arm, from playing the wii.

sort of like a trucker's tan.
After several hours of playing the wii, I now have a wii arm.

Did you see Stephens wii arm? He can lift, like, 115 lbs. with it now! But its really awkward cuz his other arm is totally useless.
by thatpersonwiththeface. January 15, 2011
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