FMLSAATC Share definition Flag An acronym for "fuck my life sideways and around the corner." Used when FML isn't strong enough. Bob: You were passed out on the kitchen floor last night. Totally wasted.Susie: FMLSAATC. FMLSAATC by &brandyleigh;; February 10, 2010 0 0 Get merch Get the FMLSAATC mug. Buy Now — $32.95 See more merch