The phrase itself is everyday Japanese for sensing that a situation has turned awkward, which is why it translates so easily to reaction clips even for viewers who do not speak the language. As a short sound, it has circulated mainly through meme and reaction edits, where its soft, uncertain tone fits moments that a louder shout would oversell. Its appeal has lasted because awkwardness is a universal setup in short-form video, and a single understated line can punctuate that feeling faster than a long explanation.