Spurt blood to pollute oneself
Chinese idiom, Pinyin is p ē nxu è Z ì w ū, which means to spit blood on others, but pollute your mouth first; it means to slander and attack others maliciously, but injure yourself first. It's from Da Cao Jiang Hu Yuwu.
The origin of Idioms
Zhang Juzheng's answer to Hu Yuwu on the Cao River in the Ming Dynasty said, "if you steal a false name, you don't know that you are first caught in the crime of a large group. The so-called" spitting blood to pollute yourself "means that you can't seek a name. It's hateful and you can also mourn."
Idiom usage
As an object or attribute; used in figurative sentences.
Spurt blood to pollute oneself
better to lead in a small position than to take a back seat under a great leader - jī shī niú cóng
stick together through thick and thin - fēng yǔ gòng zhōu