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Go Screw Yourself, made known by Avery (the singer).
Boy: Hey babe, fancy getting horny?
Girl: gsy.
by GSYnow June 28, 2011
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When you try to type gay but it ends up as gsy, because you type fast, but carelessly, so that what you think you typed was 'gay' turned out to be 'gsy'
Jamie texted Adam.
"Hey, you're not gsy are you?"

Adam texted back.
"No, I'm straigjt."
by Fried N' Defined March 13, 2018
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GSYS stands for "Go Screw Youself",

you would say it when you feel angry about someone who is a douchebag, in general, for asses.
Bob: Oh randy, I Love poetry (L)
Randy: wut? GSYS man!
by mad.graffity July 20, 2010
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A terrible song by female singer "Avery", and it can mean "Go screw yourself" Probably most appropriate used on someone ignorant or annoying to get them to go away or leave you alone.
Boy: ey gurl you lookd rele gud today

Girl: ugh, gsy and stop texting me.

Boy: fine bye but wy yu gotta b lyk that
by yaaaastfu June 02, 2011
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Being a nice dude who everyone genuinely likes.
Jonathan: "Is Alex coming on Saturday night?"
Dan: "Of course! That guy's gsy as fuck!"
by FranoH March 20, 2019
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