The exact source of ninigeoneinei is not clearly documented in the clip's listing, so it is best understood as a short internet sound rather than a line tied to a named show, film or artist. Its appeal comes from the way the unfamiliar phrase travels on its own: listeners can repeat it without needing translation, and creators can reuse it as a ready-made teasing cue. That portability has helped it circulate in meme edits and reaction videos, where short, catchy vocal hooks often outlast their original context and keep working simply because they sound funny.