Carro do ferro velho refers to the scrap-buying vans that drive through Brazilian neighborhoods announcing through loudspeakers that they buy old iron, batteries, and appliances. The looped, distorted announcements became a familiar part of everyday street sound and a repeated target for parody online, where creators edit the cry to sound like louvor praise singing. That contrast helped the clip spread as a meme sound for jokes about junk, old cars, and anything being offered for scrap.