isdgaf Share definition Flag Acronym for "I simply don't give a fuck" Dumb Bitch: "Eww, what are you wearing? Who wears that?"You: "I do, Dumb Bitch, cause ISDGAF." isdgaf by EdwardCullenIsSexy. May 30, 2009 0 0 Get merch Get the isdgaf mug. Buy Now — $32.95 See more merch