Top Definition
acronym for "knock it the fuck off", used when there's a n00b in the chat/forum who pisses you off. otherwise one may use KIO.
d00d: to me the SCAR is superior to the 416, firing tests in dusty environments proved it.
n00b: PENIS
d00d: KITFO moron
by Dawk Avengr December 26, 2008

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