The phrase comes from the wave of Brazilian anti-scam audios shared on WhatsApp, where a stern voice warns listeners that a caller pretending to be their bank is running a con. The best-known version targets the blocked card trick, in which the supposed bank sends a courier to collect the victim's card. Clipped to under ten seconds and repeated for emphasis, the line became a reusable reaction meme across Brazilian social media, where creators drop it under suspicious offers, fake promotions and obvious lies.