The hui clip comes from user generated meme soundboards, where short vocal reactions are shared by their sound alone rather than by a known film or show. Its existing description frames it in French as a relaxed hui, and that loose, drawn out delivery is how it spread in short edits and reaction posts. Because it needs no context or language, creators reuse it as a quick audio shorthand for easing off, sinking back and letting a tense or silly scene deflate.