The line comes from JoJo's Bizarre Adventure, the anime adaptation of Hirohiko Araki's manga, during the long rivalry between DIO and the Joestar family. DIO, the series' main villain, targets Jotaro Kujo in Stardust Crusaders, the arc that made the franchise popular worldwide. Fans clipped the warning and shared it on meme pages and soundboards alongside other clips like jojo ayayay, using it as a shorthand for a confident villain challenge. Its popularity has lasted because the delivery is instantly recognisable to anime viewers, even removed from the original fight scene.