F.B.A Share definition Flag F.B.A stands for "Faggot Bent Arse" a description of someone getting on your nerves. Chris and John where walking down the street and saw a Emo and said: He's an F.B.A. F.B.A by Ted Klux October 30, 2011 0 0 Get merch Get the F.B.A mug. Buy Now — $32.95 See more merch