twist the knife (in the wound)
US /twɪst ðə naɪf ɪn ðə wuːnd/
UK /twɪst ðə naɪf ɪn ðə wuːnd/

1.
雪上加霜, 在傷口上撒鹽
to make a bad situation even worse for someone, especially by reminding them of their failures or weaknesses
:
•
After he lost the game, his opponent decided to twist the knife by mocking his performance.
在他輸掉比賽後,他的對手決定嘲笑他的表現,雪上加霜。
•
She already felt terrible about her mistake, so his sarcastic comment just twisted the knife.
她已經對自己的錯誤感到非常糟糕了,所以他那諷刺的評論只是雪上加霜。