tiny dex Share definition Flag When someone tries to sneak something past you. Can be used more specifically as stealthily putting something into someone else's butt. Hey Ralph, did that guy tiny dex you? I don't remember, but my butt is super sore. tiny dex by TheBulkyLlama January 17, 2017 0 0 Get merch Get the tiny dex mug. Buy Now — $32.95 See more merch