Melodramatic Chatspeak, often used by hormonally-deprived girls on AOL Instant Messenger. Means "Oh my Fucking God."
"OMFG! WTF?! I thohught u wur kidding!!1!11!eleventyone!1!"
by Oddz January 23, 2005
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Acronym for 'oh my fucking god'. Usually used as a more extreme version of omg.
Chatperson1: I lost my virginity last night.
Chatperson2: OMFG! That's awesome!

Chatperson1: I just beat the shit out of that ugly whore Nancy Hill
Chatperson2: OMFG XD your my idol!

Chatperson1: I FUCKING HATE YOU.
Chatperson2: OMFG, where is this coming from?
by Epic Tragedy January 29, 2005
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Acronym for 'oh my fucking goldfish' (instead of 'oh my fucking god') used by more religious people.
omfg!!! Matt! Jenny! You have to see this!
by tik_oukla May 11, 2008
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abbreviation for 'oh my fucking god'
Amber: omfg you are LyKe suCh an asshole!11!!!oneoneone!!11!1!!!eleven!!1
Bob: Kill yourself!
by Herbert April 19, 2005
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