couillon

//ku.jɔ̃//insult

What does couillon mean? couillon is a French moderate that translates to “idiot, dumbass” in English.

little testicle / fool

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"idiot, dumbass"

A diminutive of 'couille' (testicle) that evolved into a standalone insult meaning 'fool' or 'idiot.' It's considerably softer than its anatomical origin suggests — more like calling someone a dummy than anything truly offensive. The southern pronunciation gives it an almost musical quality.

Among friends: 'Ah, couillon, t'as encore oublié les clés!' — ah you idiot, you forgot the keys again! Can also be genuinely dismissive: 'Quel couillon, celui-là.'