摸底牌

mōdǐpái ㄇㄛ ㄉㄧˇ ㄆㄞˊ

    • to find out the real situation
    • to sound out someone's true position

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
feel out the hole card
Meaning
Find out the real situation or someone's true position. See 摸底细.

Sources