告黑狀

Simplified: 告黑状

gàohēizhuàng ㄍㄠˋ ㄏㄟ ㄓㄨㄤˋ

    • to slander someone secretly to a superior

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
file a black complaint
Meaning
To secretly slander someone to a superior. Disapproving.

Sources