Rizz is internet slang for charm, especially in flirting, while W is shorthand for a win, and the two together became a common boast in TikTok captions, comments and short edits. This particular clip circulates as a user-generated soundboard sound rather than a line from a named film or show, so its popularity comes from how easily it fits reaction videos and meme edits. As a related rizz sound effect, it is reused whenever a creator wants a fast, confident tag for a smooth moment, keeping the slang joke instantly recognisable.