The line comes from Tim Burton's 1989 film Batman, where Jack Nicholson's Joker takes over a television broadcast and declares the city needs an enema. Gotham is presented as dirty and corrupt, so the crude joke fits his twisted campaign to remake it in his image. The scene became one of the film's most quoted moments and later circulated as a standalone soundbite on meme pages and video edits. Its mix of classic villain theatrics and toilet humor keeps it useful decades later for calling out disorder.