FAWC Share definition Flag Acronym for Fat Ass Walking Club. This is the group of over-weight people that walk up and down the neighborhood in the evening. She's a member of the FAWC. Here comes the FAWC. FAWC by Wirewise June 29, 2006 0 0 Get merch Get the FAWC mug. Buy Now — $32.95 See more merch