dice jail

A concept in many tabletop RPGs, where if a die is "naughty" or rolls consistently low a player will put the die in a small iron or plastic container styled to look like a cage.

Player 1: "My D10 was misbehaving so I put it in dice jail"
Player 2: You need another D10?
Player 1: Nah, I got enough dice to supply a small army