Could Also Be Written As OMGW.
Me: OMG (Oh My Gerard) I Saw MCR Live In Auckland!
Other Person: WTF?!? hooz MCR???nnd hooz liek, geRawrd?? Aww, I brokd a naiel!!!!!
Me: *Hits Other Person On Head With Shovel* Bitch
Correct Response - "Speak proper, or STFU, N00B!"
Silent then proceeds to sock her in the face.
Simply put OMG means, Oh my god!
Person 2: "O M G. , have they even heard of the word fashion."