It means ''laughing my fucking ass off''
Jeanette2212:Sup lone?
Lonewolf_33:Nothin much
Jeanette2212:Hey lone I didn't know you were from Texas
Lonewolf_33:Well now you do
_ckblood_47:Who likes rap music?
Jeanette2212:Uh its ok
Lonewolf_33:I don't like it at all.
Jeanette2212:Yo yo yo howdy XD
Lonewolf_33:LMFAO
Lonewolf_33:Nothin much
Jeanette2212:Hey lone I didn't know you were from Texas
Lonewolf_33:Well now you do
_ckblood_47:Who likes rap music?
Jeanette2212:Uh its ok
Lonewolf_33:I don't like it at all.
Jeanette2212:Yo yo yo howdy XD
Lonewolf_33:LMFAO
by Jeanette2212 October 04, 2008

by Irving February 21, 2004

NeedALifeGirl1: The other day I was shopping at the childrens place..
NeedALifeGirl2: lol.
NeedALifeGirl1: and OMG. a little gurl was making fun of me. ugh
NeedALifeGirl2: LMFAO.
NeedALifeGirl1: STFU
NeedALifeGirl2: u know im joking..
NeedALifeGirl1: LMFAO. kk.
NeedALifeGirl2: lol.
NeedALifeGirl1: and OMG. a little gurl was making fun of me. ugh
NeedALifeGirl2: LMFAO.
NeedALifeGirl1: STFU
NeedALifeGirl2: u know im joking..
NeedALifeGirl1: LMFAO. kk.
by LMFAOuser February 16, 2010

Laughing My Fucking Ass/Arse Off. Use in the same context as lol, rofl and haha.
Also a Music Duo with skyblu and redfoo.
Also a Music Duo with skyblu and redfoo.
Person 1: I was walking across the street and an old lady offered to help me across he road. What the hell!?
Person 2: LMFAO, why?
Person 2: LMFAO, why?
by AmazingToastMan March 01, 2016

The most party rockin band ever!! No one could ever compeat.
The two cool guys who leaad the band are Redfoo and Skyblu.
The two cool guys who leaad the band are Redfoo and Skyblu.
Awesome person: Hey did you see LMFAO's new music video?
Lame guy: who is LMFAO..?
Awesome person: ..*huge gasp*
Lame guy: who is LMFAO..?
Awesome person: ..*huge gasp*
by Chubaca's love child September 25, 2011

by SeleneMurderScene January 25, 2008

by anonimek November 07, 2011
