Jeff the Killer is a well-known internet creepypasta character, and this kind of screamer is used in fan edits, horror memes, and prank videos built around that image. Rather than a single widely agreed source recording, the sound is mainly recognized through reposts, jumpscare clips, and social media edits that use the Jeff visual for shock value. It stays popular because the setup is simple: a quiet moment, a sudden face reveal, and a loud scare sound. That formula still works in short-form horror content and reaction bait.