Popcat began as a simple browser clicking game in 2021, where players tapped a cat image to make its mouth pop open and compete for their country's total clicks. The game spread rapidly on social media and streaming, with Finland, Taiwan and other countries racing up the leaderboard and streamers turning clicking sessions into live events. The popping sound itself became shorthand for that playful, competitive tapping, and creators still reuse it in short videos and streams because it is instantly recognisable even without showing the game.