Genetically-Modified Organism, such as frankenfoods, of questionable safety due to lack of testing.
Growing numbers of people are refusing to trust GMOs.
by red_beard_neo May 20, 2004
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Can you gmo in this car cause it's hot in here
by Missfact July 3, 2017
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Formerly known as "OMG", "GMO" was created by a couple of VERY intelligent people in order to stop the madness that is (or was) "OMG". It can also be known as "GMFO", since, well, you'll know why...the definition of "GMO" is not only oh my goodness! messed up, but is also "goodness! my oligarchy!". However, since recent studies have found that "GMO" ALSO means "genetically modified organism", it has been also been developed int "MOG" (Melon of gum disease)
"I have two thumbs."
"GMO."

"I want to rule you."
"GMO."
by **spazzy** January 19, 2007
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A more excited version of OMG. It stands for God My Oh. Most used when talking about relationships.
GMO, Erin is going to marry Lachlan!
by Sushi Jones January 4, 2019
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gmo shit sucks
this stuff could bor the hell outa you
gmo gmos suck shit yes they really do
by Shoemaker January 13, 2005
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Disgusting, nasty. Acronym for "Gross Me Out". Pronounced "guh-moh".
Man, that food contains Genetically Modified Organisms - ewwww, GMO!
by clymbon May 18, 2008
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n. 1. genetically modified orgasm. 2. to have a fake orgasm.
"I just found out my girlfriend has been GMOing on me."

"Jenna Jameson is the queen of GMOing."
by mic dundee June 24, 2007
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