Bruno Aleixo is a Portuguese comedy character whose blunt, deadpan lines have become a staple of Portuguese-language internet humour. Short excerpts of his voice are widely shared as reaction sounds, especially in Brazil and Portugal, where “Isso é mentira” works as a ready-made reply to an implausible statement. The clip spread through meme pages, WhatsApp audios and short-form video edits, where its brevity made it easy to drop into almost any argument or joke. It remains popular because the phrase is simple, instantly understood and endlessly reusable.