拉硬屎

lāyìngshǐ ㄌㄚ ㄧㄥˋ ㄕˇ

    • to put on a show of being right or capable when one is not

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

May offend: vulgar language

Literally
to pass a hard stool
Meaning
To put on a show of being right or capable when one is not. Critical and coarse.

Sources