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.
See also: on, parade, rain
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

rain on someone's parade

If someone rains on your parade, they do something which spoils your plans or spoils an event that you hoped to enjoy. To make sure that all goes according to plan and no one rains on his parade, the president's safari will stay clear of trouble spots. It's irritating that he could rain on my parade by stealing the record before me.
See also: on, parade, rain
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

rain on someone’s parade

and rain on someone/something
in. to spoil something for someone. I hate to rain on your parade, but your plans are all wrong.
See also: on, parade, rain
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.

rain on someone's parade, to

To spoil someone’s plans or celebration. This term, which calls up a vivid image of a downpour spoiling elaborate floats and dampening spirits, has been around since about 1900. Sheila Rule, reporting on a plan to replace Britain’s House of Lords with an elected second chamber, wrote, “But the opposition Labor Party, which has long sought to rain on the Lords’ political parade, is once again aiming at those men and women” (New York Times, 1990).
See also: on, rain, to
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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