Khii comes from everyday Thai speech, where the word is a blunt, informal term often used jokingly among friends rather than in formal conversation. As a soundboard clip, it circulates as a short reaction sound rather than as a quote from a film, song or television show, and its appeal lies in that everyday familiarity. Online creators use it to add a local, playful edge to memes and short videos, especially when the humour depends on disgust or teasing. Because it is so brief, it travels easily across edits and remains useful whenever a quick, cheeky reaction is needed.