speak carelessly , rapidly , voluminously like the outflow of river water when the sluice gates are opened(xìn kǒu kāi hé)

speak carelessly , rapidly , voluminously like the outflow of river water when the sluice gates are opened

It refers to saying things without foundation or reliability.

The origin of Idioms

The third discount of the second volume of the romance of the Western chamber by Wang Shifu in Yuan Dynasty: "you should stop talking there, and you shouldn't just open your mouth and close your mouth."

Idiom usage

The old man of the village always talks freely, but his elder brother tends to get to the bottom of the matter. The 39th chapter of a dream of Red Mansions by Cao Xueqin in Qing Dynasty

Idiom story

During the period of Chu Han conflict, Liu Bang and Xiang Yu fought fiercely in Lingbi. Liu Bang was defeated and stationed troops in Xingyang. Xiang Yu granted yingbu the title of "emperor Dangyang" and led 400000 people to Jiujiang. How could Liu Bang's "dianyeguan" persuade yingbu to surrender. However, he still surrendered to Liu Bang. Liu Bang deliberately annoyed him, and later hosted a banquet to honor him as "Marquis of Jiujiang".

Chinese PinYin : xìn kǒu kāi hé