nfaadb Share definition Flag Acronym for Not Funny at all Douche Bag. It implies that you like to receive anal sex. Also see NFAA That post is nfaadb. Everything about you is nfaadb. nfaadb by Chang-a-lang January 15, 2006 0 0 Get merch Get the nfaadb mug. Buy Now — $32.95 See more merch