Top Definition
From the movie "Revenge of the Nerds":
A sorority called 'Omega Mu' (known as the Mus, which sounds like "Moos") composed of mostly fat and ugly girls.

Same as Omega Mu (also defined on this site), but more focused on the target looking like a cow.
Do you see that fat girl standing over there?

Oh, you mean the omegamooh?
by Keefaru April 18, 2008
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