The exact origin of Sosi Hui is not widely documented, so it is best known as a short online meme sound rather than a clip from a named film, show or song. Its two-second length made it easy to reuse, and it spread through short-form videos, edits and soundboards where creators needed a quick, recognisable reaction beat. Because the phrase itself is the joke, it does not need context to work, which helps it travel between different kinds of videos. It remains in use for light, playful edits where a fast vocal punchline fits better than a longer quote.