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a man or person who does stupid or silly actions. derived from the slang "nukka" which is a less pertinent way of saying "negro" exactly like "knucklehead" but with a twist.
da-wayne: "i got into an elevator downtown and got stuck with a bunch of fat hippy chicks for 4 hours till the fire department came."

jebediah: "thats crazy you a straight-up nukkahead"
by ryan mcgaw June 26, 2006