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1.
A term that is a combination of exaggerated expressions of shock and intense laughter

OMFG + LMFAO = OMFAO!
MAN: DUDE I ATE DOG FOOD TODAY!

MAN 2: OMFAO!! THATS WEIRD...
by FUNNNAAAYY May 31, 2009

Words related to OMFAO!

lmfao omfg fuck lmao omg
 
2.
Off My Fucking Ass Obliterated

An adjective describing a state of drunkenness during which the intoxicated individual is drunk enough to believe that 3+4 equals...5. An awesome state of being.
I was LMFAO when I saw the OMFAO people stumbling out of the bar.
by OMFAOmath April 29, 2011