Duddly Muffin Share definition Flag (dud-le MuFf-n) n./adj. 1.One who gets radical at all prices 2.One who goes stupid radical those tv kids are all fucking Duddly Muffin s Duddly Muffin by Steven Yuen February 12, 2008 0 0 Get merch Get the Duddly Muffin mug. Buy Now — $32.95 See more merch