muffinhead Share definition Flag One who has batter like brains, who places them in the oven only to see them rise into a hairy mess. Dude, you had jello for brains, but now you just have hair like a fuzzy muffin. muffinhead by DUDE ET April 16, 2005 0 0 Get merch Get the muffinhead mug. Buy Now — $32.95 See more merch