This throat-clearing clip is a generic human sound effect rather than a line from a specific film, show or viral video, which is why it appears on so many soundboards and in short-form edits. Creators use it as shorthand for social awkwardness, much like a record scratch or a cricket chirp, because listeners recognise the feeling instantly without needing context. Its popularity on meme pages and reaction videos comes from that versatility: it can soften a joke, signal a lie, or punctuate an uncomfortable pause in under a second.