Top Definition
The phrase to use when you want to tell someone to shut up and that they're full of shit at the same time.
Person 1: I'm so exhausted from working so hard on my homework!

Person 2: Shut your diaper!
#shut #up #diaper #silence #quiet #lies #catharsis
po UUUUUU Април 15, 2009
7 Words related to shut your diaper
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