The phrase 'lá vem besteira' is Brazilian Portuguese slang for 'here comes nonsense,' and it circulates online as a short meme sound for teasing reactions. The exact original clip is not documented, though uploads tag it with Maisa, suggesting a link to Brazilian TV meme culture. Like many WhatsApp audios from Brazil, it spread through reaction chains and short video edits where a quick spoken cue works better than text. It endures because the delivery is instantly readable even for viewers who do not follow the original context.