The sound takes its name from Joice Hasselmann and her toc toc toc knocking motif, reworked here with a simple piano backing that turns a spoken catchphrase style into a musical sting. Shared as a short downloadable clip on soundboards, it spread among Portuguese-speaking meme makers who use knocking sounds to signal arrivals, interruptions and punchlines. Its appeal endures because the rhythm is instantly understood even without context, the piano keeps it light rather than aggressive, and the fifteen-second length fits neatly into short videos, streams and chat replies.