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when the male uses his cock as a secondary brain, often resulting in unfortunate choices and loss of girlfriend and or bodily harm caused by aforementioned girlfriend.
man i was so cockbrain last night, i had a great time but my girlfriend kicked me in the sack this morning
58👍 8👎
A girl who is always talking about penises.
Kristen is being a huge cockbrain today.
11👍 11👎
a guy who only thinks about his dick and goes from one girl to another.
john is such a cockbrain--he was just dating bridget but after he fucked her he dumped her for anne
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someone who says something stupid cuz they been sucking to much.
person1: yo did u see the sky change orange?
person2: dog what is u talkin bout u gots that CockBrain!
2👍 12👎
When a guy hits a girl in the face with his penis. This often happens when a girl is giving a guy head. Usually an absurd gesture that a man will do to a promiscuous woman.
Guy: "So i was getting with Cheryl, and I totally cockbrained her!"
Guy 2: "Dude, she's got a shiner now!"