Rain on the parade
Meaning
Spoil someone's enjoyment.
Usage
Used when warning against pessimism around happy news.
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.
Bad weather ruining celebratory parades.
Used in early 20th-century American idioms referencing parades.