A fork of Rural Dictionary
Acronym for the interjection "oh, my mother fucking god". Commonly used as a quick way to express alarm, amazement, or dismay.
...then i was liek ommfg cos she was such a hottie and...
Oh my mother f*cking God
ommfg, did you see that
Means 'oh my motherfucking god'
Person 1: OMMFG Person 2: what, did that bitch talk shit about you again?