UD:DYW-MF Share definition Flag An acronym for " Urban Dictionary: Define Your World - Mozilla Firefox " Ontop of my browser it says, UD:DYW-MF. UD:DYW-MF by mister cow November 26, 2007 0 0 Get merch Get the UD:DYW-MF mug. Buy Now — $32.95 See more merch
