Mojo Jojo is the recurring monkey supervillain in The Powerpuff Girls, the Cartoon Network series that first aired in the late 1990s and followed Blossom, Bubbles, and Buttercup as they defended Townsville. Short confrontational lines aimed at him have long circulated online as reaction clips because they instantly signal that a plan is about to be stopped. The phrase works even for viewers who have not watched the show recently, since the name and the scolding tone are instantly recognisable from childhood cartoons. Creators still reuse it for memes, edits, and comedic interruptions.