Yuckermuffin Share definition Flag Adjective. Combination of yummy, fucking and muffin. Used to describe how delicious your muffin is. Maegen: Is that muffin good? Macy: It's a yuckermuffin. Yuckermuffin by Swoot January 25, 2011 0 0 Get merch Get the Yuckermuffin mug. Buy Now — $32.95 See more merch