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1.
Acronym for the phrase "Oh My God Innit" as used by girls from the South of England to express surprise/satisfaction/anything.
Girl1 : "Have you seen Beyonce's new mobile phone?"
Girl2 : "Oh My God Innit?"
Girl1 : "Too right!"
by Colin Woods July 15, 2004
 
2.
Abbreviation for "Oh My God I Suck"
guy1:OMG you were the last on the race!

guy2:OMGIS
by robi120i December 13, 2010