have illicit relations with sb
Chinese idiom, Pinyin is y ú Qi á ngku ī x ì, which means that men and women cheat on each other. From Mencius Teng Wengong II.
The origin of Idioms
Mencius Teng Wengong II: "if you don't wait for your parents' orders and the matchmaker's words, you can see each other through holes and follow each other beyond the wall, then your parents and countrymen are cheap."
Idiom usage
It is easy to suffer from lust, suffering from illness and death, and even to be greedy, to break the law without paying attention to it. The first chapter of Fang Ruhao's Chan Zhen Yi Shi in Ming Dynasty
Analysis of Idioms
[synonym]: go beyond the wall to dig a hole, go beyond the wall to dig a gap
have illicit relations with sb
allow oneself to be insulted to remain alive - rěn chǐ tōu shēng