Lá vem o golpe is Brazilian Portuguese slang for 'here comes the scam', and the phrase became a running joke across Brazilian social media, especially on TikTok, Instagram Reels and WhatsApp, where users forward short funny audios to friends. The clip is typically used as a reaction sound rather than tied to one specific video, which helped it spread as creators applied it to new contexts like fake promotions, suspicious messages and obvious pranks. Its short length and instantly recognizable warning tone keep it in steady rotation as a reaction sound.