The phrase comes from informal French internet slang, where tkt is shorthand for t'inquiète, meaning don't worry, and fermer ta gueule is a blunt way of telling someone to shut up. Short voice clips like this circulate widely in French-language meme, gaming and reaction communities, where a single confrontational line can carry a whole joke without extra explanation. Because the wording is short, direct and easy to recognise, creators reuse it as a reaction to overconfidence, nonsense or unwanted commentary, and its appeal lies less in a single viral source than in how instantly it ends a conversation.