rain on someone’s parade
rain on (one's) parade
To ruin one's plans or dampen one's excitement. I hate to rain on your parade, but I think your A in chemistry was actually a clerical error. Mom really rained on our parade by chaperoning our school dance.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
rain on someone’s paradeand rain on someone/something
in. to spoil something for someone. I hate to rain on your parade, but your plans are all wrong.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.