This is a different spelling of "oh my god", which is a common expression of surprise. The phrase was popularized by Valley Girls in the 80's, and can be heard in bars and sorority houses nationwide.

Example:

She wore a purple shirt with that skirt! Omigod, what was she thinking!

-or-

OMIGOD! I haven't seen you in SO long!

Log in or registerto write something here or to contact authors.