"Omguh" is the vocal pronunciation of the internet acronym "OMG," which stands for Oh My God. It is often used sarcastically. The vocal phrase was first popularized by the eponymous host of the cable television program "Unscrewed with Martin Sargent," which aired on the now-defunct TechTV from 2003-2004.
(While viewing a reality television show featuring D-list celebrities performing obnoxious stunts for publicity): "Omguh! Did you SEE what Cory Feldman just did?"
by Hologram Madison September 16, 2008