The name refers to JoJo's Bizarre Adventure, the long running manga series by Hirohiko Araki that began in 1987 and later became a popular anime adaptation. Its heroes across generations share the JoJo nickname, and the series is known for dramatic poses, intense confrontations and highly stylised delivery. Fans clipped exaggerated name shouts and reactions from anime scenes and shared them on soundboards and short video platforms, where the stretched JoJo call became a reusable cue for dramatic entrances and parody fight scenes.