Carro do ferro velho refers to the scrap-buying cars that have circulated in Brazilian towns and suburbs for decades, using recorded loudspeaker announcements to offer cash for iron, aluminum, batteries and broken appliances. The recordings vary by driver, but the drawn-out, echoing delivery has become instantly recognizable across Brazil. Online, clips of the announcement spread through WhatsApp groups and meme pages as a shared cultural reference, reused whenever something looks rusty, outdated or ready for the junkyard, long after the actual car has passed.