To rain on your parade means to spoil someone's plans or happiness by saying or doing something negative. It is used when someone interrupts a good moment with bad news or criticism.
The phrase comes from the image of a parade being ruined by bad weather. If rain falls during a parade, it makes the event less enjoyable for everyone.
The phrase comes from the image of a parade being ruined by bad weather. If rain falls during a parade, it makes the event less enjoyable for everyone.
I don't want to rain on your parade, but the concert you wanted to see has already sold out.