a stab in the back

• n. 诽谤；伤人的暗箭

a stab in the back的用法和样例：

例句

用作名词 (n.)

1. He claimed that the newspaper report was a libel.
   他声称报纸上的报导是一种诽谤。
2. He does not wish to take part in mud-slinging.
   他极不愿参与诽谤他人的行动。