This sound circulates as a very short reaction clip associated with the name Da Shi, with the falling eh as its entire joke. Its appeal lies in its brevity: at under a second, it can be dropped into memes, edits and short videos without interrupting the flow of a scene. Online creators tend to use it as a shorthand for disappointment, indifference or mild disbelief, letting a single flat sound do the work of a longer reaction. That simplicity keeps it useful across gaming highlights and comedy edits, where a quick, unimpressed response is often funnier than an elaborate one.