SHUT THAT KEY UP Share definition Flag Something you shout when someone is being extremly loud in opening a door. Person 1: WILL YOU SHUT THAT KEY UP? Person 2: Sorry, its a new lock! SHUT THAT KEY UP by DaneCookTheCheater January 27, 2009 0 0 Get merch Get the SHUT THAT KEY UP mug. Buy Now — $32.95 See more merch