The Raykin Mouth clip comes from a user-generated soundboard upload, where it was listed under that exact handle-style name with no artist or source notes attached. With only a couple of seconds of audio and a very small play count, it looks like a personal recording shared for other creators rather than a clip taken from a show, game or viral video. Short mouth noises like this tend to circulate because they are easy to drop into edits, and this one survives in that same niche as a tiny, reusable accent.