to do something that spoils someone's plans
-Oh dude this gig's gonna be so f-ing awesome and EVERYONE's gonna get so f-ing drunk!
-Sorry to rain on your parade, but there's no f-ing alcohol allowed inside the building.
by Mochizukii October 4, 2008
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a) verb: (to) - to spoil someone's moment of fun or glory, often used sarcastically.
b) a synonym for the phrase " sorry to tell you this but (...)", followed by whatever piece of bad news you want to tell the person.
my ex-gf once told me, sorry to be raining on your parade, but I refuse to continue going out with you, unless you start going to the gym.
by Sexydimma June 28, 2014
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