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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*
by fhk x3 May 23, 2016
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2
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*
by fhk x3 May 23, 2016
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Get a OHMG mug for your brother-in-law Manafort.
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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.
by JMPopsicles December 30, 2007
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