stands for Oh My Gay God. Refers to the uber popular Myspacer Matthew Lush or the "Gay God."
Jen: "Omgg, Matt Lush's live Stickam show was cancelleddd!!!"
Jen: "OMGG!!! I just typed in "Matt flip your hair!" on the webchat box off of his Stickam live show and HE FLIPPED HIS HAIR!!!" *faints*