An opportunity cock is the man who is not chosen by a girl when she has to make a choice between 2 guys. Deriving from the term opportunity cost, meaning the item not bought when choosing between 2, the opportunity cock is basically the man the girl leaves behind at the bar when she sees a much more attractive rich man.
John: “Can’t believe Ann chose Andrew over me. What’s wrong with me?”

Jim: “Damn, you’re the opportunity cock in this situation. Rip mate”
by Kim Jong deux February 1, 2019
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This describes a man who does not care if a woman is short or tall, thick or thin, black, brown, red, yellow, or white skinned, if she has kids or not, or if they are 10 years older or younger. Or 20 years, within the boundary of the law.

A woman only needs to be attractive for an 'equal opportunity cock' to be interested in having sex with said woman, and of course, attractiveness is relative...

The song 'Every Girl' by Lil Wayne describes the mindset of an equal opportunity cock.
(Spotting a hottie) Bob: I'd hit that.

John: I'd hit lots of women. I have an equal opportunity cock.

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White guy 1: I'm not attracted to black women.

White guy 2: Whatever. I have an equal opportunity cock.
by t_doffing July 18, 2009
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