Stands for "rolling my ass off". One of the best online terms you can possibly use. Cousins with "lofl".
d00d taht shit wuz so funny!!!111 rmao!!!!11
by Gomez Gomez Gomez October 11, 2005
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Raugh(ing) My Ass Off

Occasionally used by asians as a replacement for lmao.
Janis: Dude, that kid Wes's mom caught him masturbating.
Kornya: RMAO
by Tengent September 8, 2009
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Dude 1: You hear what happened to James when he tried to beat the train on the railroad crossing?
Dude 2: I don't care - guy's a douche.
Dude 1: He got owned.
Dude 2: RMAO!
by halo_player_598 February 16, 2009
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Jim, I'm RMAO with my short shorts right now. Need to keep training for the marathon.
by Cog3r June 12, 2009
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