2FB Share definition Flag two faced bitch, someone with two personalities. Used more to describe girls rather than boys. girl: katie is a a dog girl#2: why do you say that? she's nice to me... girl: really? what a 2FB! 2FB by Baby Gaby November 28, 2005 0 0 Get merch Get the 2FB mug. Buy Now — $32.95 See more merch
