raining on someone's parade

Verb

rain on someone's parade (third-person singular simple present rains on someone's parade, present participle raining on someone's parade, simple past and past participle rained on someone's parade)

1. (idiomatic) To spoil someone's celebration.
   • Sanju Baba, we learn, is rather miffed at the way Kunder rained on his parade and took away the spotlight from Agneepath's success.2012 January 31, “Shah Rukh Khan, Shirish Kunder's drama ends”, in Times of India, Bollywood
2. (figuratively) To disappoint or discourage someone by ruining or criticizing their plans or aspirations.
   • I hate to rain on your parade, but lots of people have tried that strategy and it hasn't worked yet.

   Synonyms:

   burst someone's bubble, piss in someone's cereal, piss in someone's Cheerios, piss in someone's cornflakes, piss on someone's chips, piss on someone's bonfire, piss on someone's campfire, put a damper on, shit in someone's cereal, shit in someone's Cheerios