The phrase 'on s'en bat les couilles' is long-established vulgar French slang for complete indifference, roughly equivalent to 'I don't give a damn' in English. Adding the name Anton turns a general expression into a direct, personal dismissal, which is part of why this short clip works so well as a reaction sound. It circulates on French-language soundboards and social feeds, where creators use it to shut down complaints, gossip, and drama in a single second.