射冷箭

shèlěngjiàn ㄕㄜˋ ㄌㄥˇ ㄐㄧㄢˋ

    • to attack or slander someone secretly and unexpectedly
    • to stab in the back

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
to shoot a cold arrow
Meaning
To attack or slander someone secretly and unexpectedly from behind. Critical; the same as 放冷箭.

Sources