The losing horn comes from The Price Is Right, the long-running American television game show in which contestants bid on prizes and play pricing games. When a contestant fails to win a prize, the show plays this descending brass sting to signal the loss. As clips from the show circulated online, editors began reusing the sound as a universal shorthand for failure, and it spread through reaction videos, gaming streams and short-form edits. It remains popular because the cue is instantly understood, even by viewers who have never watched the full show.