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1.
Another meaning of omg used in internet online speech, and online games. Its more of a dramatic way of saying "omg!!"
Pronounced "Zoh-my-god" basically same meaning just more dramatic.
z0mg, did you see that thing!?
by Lauren Wainwright December 27, 2005
 
2.
When something is beyond saying OMG.
z0mg Becky, look at her butt, it is so big! Lolz0rrzz
by saugussophtreasurer07 November 13, 2007
 
3.
Z0MG is the model name of 11-inch macbook air, which were manufactured in 2011.
11-inch MacBook Air is Z0MG Awesome
by sashazykov December 11, 2011