A Nigger Wacker is a long, hard, stick, NOT a penis. used to beat black people. Ussually 2-3 feet long, Preferably with small limbs sticking out of it to inflict extra pain.
A NiggerWacker. "If he wasn't black before i hit him, he's black now."
One, who in real life has no friends nor life, yet lives in a gay world of internet wacking in which he hits on chix he doesn't know and masturbates to their pictures.
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.