Top Definition
describing someone so gay and sneeky that they can steal your anatomy and, at the same time, your heterosexuality without you ever realizing till it's too late.
Person one: "Hey! you best keep your hands cupped over your scrotum and cock, because that young fellow over there is one sneeky little cockthief!"

Person two: "Okay."

by Dismal Euphony December 07, 2006
A man that will cockblock you then attempt to fuck the girl you were macking on
Tony:Look at Jeff macking on that chick over there
Greg: WTF?! He just cockblocked me from that girl
Tony:What a cockthief
by ak47=fag March 03, 2011
An unappealing that woman that provokes performance issues in a male suitor.
The bar was closing and there was no one left except for this cock thief. I took her home and I was right.
by Richard Hood January 16, 2009

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