rain on someone's parade
US /reɪn ɑn ˈsʌm.wʌnz pəˈreɪd/
UK /reɪn ɑn ˈsʌm.wʌnz pəˈreɪd/

1.
掃某人的興, 破壞某人的計畫
to spoil someone's pleasure or plans
:
•
I don't want to rain on your parade, but I think you should reconsider your decision.
我不想掃你的興,但我覺得你應該重新考慮你的決定。
•
He always manages to rain on someone's parade with his negative comments.
他總是會用負面評論掃別人的興。