Top Definition
Engrish version of LMFAO...Laughing My F*cking A*s Off.
Oh, sank you so belly much for retting me watch Purdue Football. They suck so bad, I was RMFAO!
by Robster Craws September 07, 2005
1 more definition
5 Words related to RMFAO
Acronym for "Rolling My Fucking Ass Off," commonly used by ravers who have taken some "good" or real Ecstasy (MDMA).
"OMFG dude, I just dropped a white quadruple-stacked Mitsubishi and I'm RMFAO!"
by The Posp May 27, 2004

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