The line is credited on Brazilian soundboards to Mução do Brasil, a long-running comedy character known for loud, caipira-style humor and catchphrases. Clips of his rants became staples of Brazilian meme pages, WhatsApp audio chains and short video edits, where one blunt phrase can carry a whole joke. 'Tu deixa de mentir' fits that style perfectly, a direct, familiar way to tease someone in Portuguese. Because it is short, instantly understandable to Brazilian audiences and easy to lip-sync, it keeps reappearing in reaction memes and dub edits.