胡说八道 talk nonsense
Explanation
没有根据或道理的瞎说。
Talking nonsense without any basis or reason.
Origin Story
从前，在一个偏远的小山村里，住着一个爱说大话的年轻人，名叫张三。张三喜欢夸夸其谈，常常编造一些离奇的故事来吸引别人的注意。有一天，村里来了一个外地的商人，张三为了显摆自己的见识，便开始胡说八道，吹嘘自己曾经到过很多遥远的地方，见过很多稀奇古怪的事情。他绘声绘色地描述着自己如何与老虎搏斗，如何从龙宫取宝，如何与神仙交朋友……他的话语虽然生动有趣，但却漏洞百出，充满了不靠谱的细节。周围的人们一开始都被他吸引住了，但渐渐地，他们发现张三说的都是些不着边际的胡话，于是纷纷露出质疑的神情。商人看穿了张三的把戏，轻蔑地笑了笑，然后直接揭穿了他的谎言。张三的谎言被揭穿后，感到非常尴尬，从此以后再也不敢胡说八道了。从此以后，村里的人们都引以为戒，不再轻易相信那些没有根据的夸夸其谈，而是更加注重事实与证据。
Once upon a time, in a remote mountain village, there lived a young man named Zhang San who loved to tell tall tales. Zhang San enjoyed boasting and often fabricated bizarre stories to attract attention. One day, a merchant from another region came to the village. To show off his knowledge, Zhang San began to talk nonsense, bragging about his travels to distant lands and his encounters with strange things. He vividly described how he wrestled with tigers, how he stole treasures from the Dragon Palace, and how he befriended gods… His stories were lively and interesting, but full of inconsistencies and unbelievable details. The villagers were initially captivated, but gradually realized that Zhang San's narratives were pure fantasies, and expressed their doubts. The merchant saw through Zhang San's charade, smiled scornfully, and exposed his lies. After Zhang San's lies were revealed, he felt very embarrassed and never dared to talk nonsense again. From then on, the villagers took Zhang San's story as a warning and no longer readily believed unfounded boasts, instead placing more importance on facts and evidence.
Usage
用来形容说话没有根据，乱说一气。
Used to describe talking nonsense without any basis.
Examples
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他总是胡说八道，根本不可信。
tā zǒngshì hú shuō bā dào, gēnběn kě xìn.
He always talks nonsense; he's not credible at all.
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不要胡说八道，事实胜于雄辩。
búyào hú shuō bā dào, shìshí shèngyú xióngbiàn.
Don't talk nonsense; facts speak louder than words.
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课堂上，老师告诫同学们不要胡说八道。
kètáng shàng, lǎoshī gàojiè tóngxuémen bù yào hú shuō bā dào
In class, the teacher warned students not to talk nonsense.