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laugh my fucking ass off loudly and uncontrollably
can also use:
lmfaol&u
ugly guy: hey hottie
pretty girl: hey
ugly guy: you are so hot, and beautiful, and cute, and blablabla
pretty girl: thanks
ugly guy: so cutie what do you think about me?
pretty girl: LMFAOLU xD!!!!
ugly guy: what?
pretty girl: bitch please...
LMFAOLU by who who June 11, 2008
Related Words
Dude, did you see that girl trip?

Yeah, lmfaob
lmfaob by Starla G. December 27, 2008

LMFAOL&U 

laugh my fucking ass off loudly and uncontrollably
can also use:
lmfaolu
ugly guy: hey hottie
pretty girl: hey
ugly guy: you are so hot, and beautiful, and cute, and blablabla
pretty girl: thanks
ugly guy: so cutie what do you think about me?
pretty girl: LMFAOL&U xD!!!!
ugly guy: what?
pretty girl: bitch please...
LMFAOL&U by who who June 11, 2008
Laughing My Fucking Ass Off Lol

When someone laughes so hard,his ass is ripped off and he is still laughing
Guy 1: LAWL THIS C00ki3 smells like MA SH!T

Guy 2: LMFAOL!!!!!1111

LMFAOBTWTFF 

Fernie:> Dude, shoulda been here. Josie Rosie just tbagd that dbag xbf of Monica's

Eddie:> LMFAOBTWTFF! FTP!
Stands for Laughing my F*cking ass off big time
Me: hey did you see that biatch picking her nose, I thought she was gonna pull out her brain?

Friend: Yeah, I was LMFAOBT at her, she was a dumb ass, so her brain would have come out easily through her nose.
LMFAOBT by paulusthewalrus June 19, 2010