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cockbrain

Cockbrain is a vulgar insult for someone whose thinking seems to be driven by their libido rather than their intellect — the implication being that their brain has been replaced by, or is located in, their genitals.

ˈkɑkɹˌbeɪn198 viewsLast reviewed Jun 29, 2026+ Add a definition
🗺️ Regional & Other
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#1·Apr 28, 2026

Cockbrain is a vulgar insult for someone whose thinking seems to be driven by their libido rather than their intellect — the implication being that their brain has been replaced by, or is located in, their genitals. Used humorously more often than viciously, it suggests that the target makes boneheaded decisions, prioritises sex or lust above everything else, or simply acts like an idiot. It follows a long tradition of compound insults that combine anatomical terms to imply stupidity.

Only a complete cockbrain would reply-all to the entire company with that message.
Origin: Editorial expansion authored on Slangora (model-assisted, hedged).
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Avoid at work
#2·Apr 26, 2026

(slang, vulgar, humorous) A stupid person.

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🗺️About Regional & Other slang

Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.

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