The phrase comes from everyday Thai slang, where kwai, meaning buffalo, has long been used as a teasing insult for someone acting foolishly, and luan luan emphasises that there is nothing else mixed in. As a short recorded clip it spread through Thai social posts, meme edits and chat sharing, where a five second voice line is easy to reuse. Its popularity rests on that directness: one familiar phrase instantly frames a clip as mockery, so creators keep using it for reaction jokes rather than serious arguments online today.