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2.
Phrase meaning oh my fucking god.
The "z" is just used to over exagerate the phrase.
Usually used by Paul Griffiths
Paul: I own babycakes
Loser: what's babycakes
Paul: Omfgz!
by daniel$cott March 02, 2008
 
1.
OMFGZ is an exaggeration of OMFG, meaning Oh my fucking god.
You use it to impersonate an over enthousiastic person.
Alan: Yay I can't wait to go to Rome it's gonna be so cool omg omg
You: OMFGZ YA T3H R0ME IZ DA BEZT ROFLOL
by Nesco May 23, 2007
 
3.
A variant of OMFG but with zombies, usually used in a one word sentence.
OMFGZ! OMFGZ. OMF-gurgahhadghdh Brains.
by shicknannon@gmail.com December 15, 2009