rain on someone's parade
Definition from Wiktionary, the free dictionary
(Redirected from rain on somebody's parade)
- (figuratively) To disappoint or discourage someone by ruining or criticising 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.
- (vulgar) piss in someone's cornflakes
to disappoint or discourage someone