peanutbutter face Share definition Flag Someone who is ugly AND fat. Should be used as an insult unless you like being told you're both fat and ugly. "Dude! Did you see that chick?!" "Yeah, man! She was a total peanutbutter face! peanutbutter face by damnitrandii December 16, 2008 0 0 Get merch Get the peanutbutter face mug. Buy Now — $32.95 See more merch