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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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ZOMG is a varient of the all-too-popular acronym "OMG", meaning "Oh My God". ZOMG originated from the imageboard 4chan.org and one of it's members Zardoz.

Always used in all-caps, 'ZOMG' is generally used in a sarcastic manner, more often than not a humiliating fasion. It is also used as a device for stating the obvious.
ZOMG REI-CHAN!!! - A 4Chan user exclaiming sarcastic joy over a picture of Rei from Evangelion.
by Sniffles March 10, 2005
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