打冷枪

Traditional (Taiwan): 打冷槍

dǎlěngqiāng ㄉㄚˇ ㄌㄥˇ ㄑㄧㄤ

    • to attack someone by surprise
    • to take a pot shot
    • to stab in the back

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
fire a cold shot
Meaning
To attack someone secretly when they are off guard. Critical. Close to 'to take a pot shot' or 'to stab in the back'.

Sources