Redrum comes from Stephen King's The Shining and Stanley Kubrick's 1980 film adaptation, where young Danny Torrance chants the word and writes it on a door. In the mirror it reads as MURDER, revealing the warning his psychic gift is trying to send. The scene became one of horror's most quoted moments, and the chant has since been sampled, parodied and remixed across trailers, Halloween edits and meme videos. Its staying power is simple: one reversed word instantly signals possession, danger and a child who knows more than the adults.