The line comes from El Chavo del Ocho, the Mexican comedy series created by Roberto Gómez Bolaños, where the boy Chaves often used the contradictory excuse after getting into trouble. In Brazil, where the show became a cultural staple through its Portuguese dub, 'sem querer querendo' entered everyday speech as a playful way to admit a not-quite-accident. Shared in memes, reaction videos and short edits, it survives because the joke needs no explanation for audiences who grew up hearing it.