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Means "Get A Fucking Yak" used in the MMORPG RuneScape.
Tom: Ugh i hate banking dragon bones. Lowlvdef: gafy noob.
by Lowlvldef August 15, 2010
Go And Fuck Your Self
GAFYS you hoe!
by maxeh April 23, 2003
Go And Fuck Yourself
I've had enough of your shit! GAFY!
by Chief Ops Guy and Master Pimp November 28, 2006