Crumpetmuncher Share definition Flag A derogatory term for someone from Britian. A spin off of the term carpetmuncher. British: Ugh, Americans are so fat and obnoxious! American: Shut up you fucking Crumpetmuncher! Crumpetmuncher by Lilli her Excellence July 19, 2011 0 0 Get merch Get the Crumpetmuncher mug. Buy Now — $32.95 See more merch