The exact origin of sjiejejei is not clearly documented, which is common for short clips that spread through user-made soundboards and meme edits rather than a single film, show or song. Its appeal comes from its nonsense sound: it is easy to recognise, easy to drop into a video and instantly signals silliness without needing context or subtitles. Because it works as a pure reaction noise, creators keep reusing it for exaggerated fails, surprises and playful teasing, keeping the clip alive in short-form edits long after its first uploads.