shut your diaper Share definition Flag 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 your diaper by UUUUUU April 15, 2009 0 0 Get merch Get the shut your diaper mug. Buy Now — $32.95 See more merch
