This sound comes from Chaves, the Brazilian Portuguese adaptation of the Mexican sitcom El Chavo del Ocho, a series that became hugely popular on Brazilian television. Short dubbed lines from Chaves spread widely in meme culture because the voices are familiar across generations and the phrasing is easy to reuse in jokes. “Cê não morreu?” stays popular in reaction edits and chat memes because it instantly communicates disbelief when someone reappears after a dramatic, exaggerated or obviously premature send-off.