This sound is widely used online as a quick refusal or disagreement cue rather than for a single definitive source. Short "nuh uh" clips spread easily on meme pages, reaction edits, and short-form video because they communicate a clear no in under two seconds. Its popularity comes from how cleanly it fits over captions, awkward pauses, and instant reversals. Creators still use it because the meaning is immediate, the delivery is funny, and the timing works well in fast meme editing.