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A condition of extreme (sometimes foolish) confidence or boldness pertainng to or having to do with the size of one's penis ("cock")
Only the most cocksure rookie was willing to stand up to the captain of the football team.
by ska_trombonist December 01, 2005
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2
damn right positive not wrong Certainly knowing and believing; confident beyond doubt;implicity trusting; unquestioning; positive;American slang.
Boy are you cock sure of that?
by j r lang January 04, 2008
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3
premature assumption of the complete and utter truth in one's thoughts, opinions, and actions. Cocking your gun with no ammo. Gunning your cock at anything that moves.
Regina, whose conjectural advances on others may seem overwhelmingly cocksure, occasionally comes to a veritable climax of intuition.
by plan bee February 15, 2010
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4
A feeling of confidence, superiority, greatness, and swagger only obtained by pure animals. This "attitude " or "lifestyle" in fact has absolutely nothing to do with the size of one's penis, but is more a way of life for wildmen.
Frat guy #1:"Boy Larry is really killing it with the ladies tonight!"

Frat guy #2:"Yeah, I know! He's such a cocksure wildman!"
by Uncle Larry January 26, 2010
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5
damn right positive not wrong Certainly knowing and believing; confident beyond doubt;implicity trusting; unquestioning; positive;American slang.
Boy are you cock sure of that?
by j r lang January 04, 2008
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6
to be very very sure, so sure that you'd bet you cock on it. From the classic British novel, Heart of Gayness
I was cocksure that I had failed that english test horribly
by tom wage September 14, 2003
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