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Gaynious is an expression used as a sarcastic comment for naming a person that has done something stupid (like genious) but also insinuates that that person is gay.
Marko: Central heating is harming the world
Jurus: You mean global warming?
Marko: Oh yeah that's right
Jurus: Fuckin' gaynious
by Jurus June 19, 2007
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