The sound comes from Beijinho no Ombro, the 2013 funk carioca hit by Brazilian singer Valesca Popozuda. The song turned its shoulder-kiss gesture into a national catchphrase for ignoring envy, spreading through radio, television and dance videos across Brazil before reaching social media. Its confident hook made it easy to reuse as a reaction, and Brazilian creators still drop short clips from it to answer criticism, celebrate a win or close a video with a bold, unbothered attitude.