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1. cock cousin
An insult for two males that like to play with each other's penis/cock.

Similar to butt buddy.
Dude you and Ryan are not only butt buddies but also cock cousins.

I coined the term cock cousin to describe Doug's infatuation with Ryan's dick.
2. cock cousin
Guys who hang out a lot and are more than "just friends." Similar to butt buddy.
Doug and Ryan are cock cousins.
Dude quit being his cock cousin.
3. cock cousin
Two men are cock cousins when they have both had sex with the same hole of any specific woman.

Also see snatch sisters.
"My ex-girlfriend has become a right slut; I'm probably cock cousins with half of {town/bar clientèle} by now."
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