The word redrum is murder spelled backwards, made famous by Stephen King's The Shining and its 1980 film adaptation, where it is written on a door and repeated in a raspy whisper. That reference became a lasting horror shorthand online, reused in memes, edits and Halloween posts long after the film. This popin version adds a short popping hit to the phrase, making it lighter and easier to drop into pranks and reaction videos, which is why it keeps circulating on soundboards as a quick creepy punchline.