Online, nao zi you dong circulates as a short Chinese insult meme, shared in reaction clips, comedy edits and short-form videos where a quick verbal jab works better than a long explanation. Its appeal comes from its brevity and bluntness: the whole joke fits into just over two seconds, so it can punctuate a fail without interrupting the action. Because the phrase is easy to recognise and repeat, creators keep returning to it for light-hearted teasing rather than genuine criticism.