Top Definition
laughing so fucken loud

its sorta related to lol but uses profanity!
that's so funny! lsfl
by lmrulez June 06, 2008
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
by Funkessentials January 16, 2012
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