knucklehead mcspazatron Share definition Flag a kid or an idiot; a random name used to insult someone Spongebob:"I might be a kid, or a goof ball, or a knucklehead mcspazatron." knucklehead mcspazatron by fatboy November 22, 2004 0 0 Get merch Get the knucklehead mcspazatron mug. Buy Now — $32.95 See more merch