muffin Share definition Flag Muffin is a replace for fuck, but way worse. Don't every say muffin out of context or it will get you in trouble. "Give me all of your money" Robber said to me "What the muffin!" I replied muffin by coochiewomen February 18, 2021 0 0 Get merch Get the muffin mug. Buy Now — $32.95 See more merch