Rain on your parade
Meaning
Disappoint or spoil someone's good mood or celebration.
Usage
Used when news or events dampen enthusiasm.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Parades depend on good weather, so rain would ruin the festivities.
Mid-20th-century American idiom that quickly spread into broader culture.