A fork of Rural Dictionary
It's a run-together acronym for "Oh my god/goodness/gosh"
Person 1: Gurrrl did you just see that?!Person 2: OHMG, you mean... that?!Person 1: YES! *squeals*
OMG for people that can't spell OMG.
OHMG am I stupid.
oh megan gonn! dsiognklsdaghsoignds what in the world?! oh my goodness. good golly miss molly!
jenna exclaimed "OHMG" when we all just missed the boat.