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.
usually spelled entirely in caps, this abbreviation originates from the typo you get when you strike the shift key in order to type OMFG, but you miss and hit the z instead.
Zomfgz (zoh my fucking godzorz) is the neo generation zomfg invented by a jamerican cult in Tokyo. The word has managed to expand throughout the world thanks to the zomfgz campaign initiated by Sabian Ramirez.