打筆墨官司

Simplified: 打笔墨官司

dǎbǐmòguānsi ㄉㄚˇ ㄅㄧˇ ㄇㄛˋ ㄍㄨㄢ ˙ㄙ

    • to argue in writing, e.g. in newspapers or letters

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
to fight a lawsuit with pen and ink
Meaning
To argue in writing, such as in newspapers or letters. Neutral or slightly wry.

Sources