畫問號

Simplified: 画问号

huàwènhào ㄏㄨㄚˋ ㄨㄣˋ ㄏㄠˋ

    • to have doubts about someone or something
    • to question whether it is reliable

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
draw a question mark
Meaning
To have doubts about a person or matter; to question whether something is true or reliable. Neutral, colloquial.

Sources