don't rain on (one's) parade(redirected from don't rain on their parades)
don't rain on (one's) parade
Don't ruin one's plans or temper one's excitement. He's all happy because he thinks he got the job on his own merit. Don't rain on his parade by telling him you called in a favor. Mom, please don't rain on our parade by chaperoning the school dance.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.