In the same likeleness as a button-masher: one who has no skill in a video game so they just hit alot of buttons, wii-wacker refers to one who has no skill in a wii game, so they just swing the wii-mote around like a weed-wacker.
"She is is such a wii-wacker when she plays Wii Tennis"
by Eric Thortsen December 10, 2006
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