LSFL Share definition Flag Acronym for - Laughing So Fucking Loud, commonly used on social networks and in sms messages. Did you hear that Motel Fridays has closed down??Yeah, i'm totally LSFL right now LSFL by Funkessentials January 27, 2012 0 0 Get merch Get the LSFL mug. Buy Now — $32.95 See more merch
