wǔ wén nòng mò

ㄨˇ ㄨㄣˊ ㄋㄨㄥˋ ㄇㄛˋ

Idiom

1(idiom) to display one's facility with words

2to show off one's literary skills

3(original meaning) to pervert the law by playing with legal phraseology (墨 was a reference to 绳墨|绳墨)