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1. A variant of omg which means "oh my god". It first originated as an rare typo when someone says "OMG" in caps and presses the left shift key rather then the right and accidentally hits the near by Z.

It was picked up and used as a humorous way of saying omg and making fun of internet slang in general do to its funny pronunciation of "Zoh-my-God!".
Like ZOMG ashley guess what!!1
by Kyle117 December 11, 2006
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A very alternative definition is "Zombies, oh my God" when you're surprised by zombies. Also works with zebras and xylophones, because when someone is surprised by a pack of xylophones they often forget how to spell it.
*Pack of Xylophones Charge At A Random Person*

Random Person: ZOMG!!!!
by Zombies Oh My God June 04, 2010
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oh my gosh's variant. used to excite one another. this is used constantly by those who make fun of people that say omg and lol.
zomg u teh very cool lolz!1111oneoneoe
by glenn November 30, 2004
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an extremely pointless phrase, created by a typo. while trying to reach the shift key and type OMG, the z was typed.

many people enjoy making fun of this phrase.
ZOMG I COLLECTED ALL 862934127 POKEMON CARDS!! ZOMG!!!!!
by ZOMGLETSGETTHISPARTYSTARTED November 20, 2008
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