Because the clip is so short and ambiguous, it has circulated as a reusable reaction sound rather than as a quote tied to a show or character. Creators tend to save it for moments that need a quick, exaggerated vocal reaction without words, and its stretched iiiih shape makes it easy to recognise even at low volume. It sits alongside other elongated vocal sounds like fahhh and faaah that work the same way in memes, where a single squeal can carry surprise, embarrassment or playful teasing. That flexibility is why it keeps appearing in short-form edits despite its niche audience.