rub salt in the wound
US /rʌb sɔlt ɪn ðə wund/
UK /rʌb sɔlt ɪn ðə wund/

1.
雪上加霜, 伤口撒盐
to make a difficult situation even worse for someone, especially by reminding them of their failures or misfortunes
:
•
Losing the game was bad enough, but then the coach decided to rub salt in the wound by criticizing every player publicly.
输掉比赛已经够糟糕了,但教练却决定雪上加霜,公开批评每一位球员。
•
She didn't get the promotion, and to rub salt in the wound, her junior colleague got it instead.
她没有得到晋升,更雪上加霜的是,她的初级同事反而得到了。