You might see this term in a video of how is twitter free. My research concludes to most probable definition is the following: L - Laughing M - My A - Arteries O - Out
You find yourself in a FaceBook group chat. Hey Susan did you see that me-me is sent you? Yes Geraldine it was delightful! I'm LMAO.
By sub to Fainted
Lobsters Making Anonymous Observations
Who wrote this? Isn't it obvious? Lmao!
By Hubeebe
L lick M my A ass O onee-chan Ofc why would it be anything else
Hey mum What? Lmaooooooooooo
By PP_lord69
L-et M-e A-ssault O-rally, be careful if someone says this to you!
Random creepy guy that likes radiohead too much: "LMAOOO" girl: "omg why would you say that?"
By Joseph_2002
Lick my ass out
"Hey man, LMAO?"
By PleaseLMAO4234