The sound comes from Filian, a VTuber whose energetic streams and short reaction moments are frequently clipped and shared as soundboard audio. The phrase itself is a common way of admitting confusion, which helps it travel beyond any single stream, as viewers reuse it whenever a joke, reference or explanation flies past them. Because the delivery is light and instantly recognisable as a confused reaction, it has stayed useful for stream highlights, short-form edits and meme videos where a quick admission of not getting it is funnier than pretending otherwise.