The shadow on the ground left by the shape of a man's testicles below his anus
man: 'Hey honey! Look at my Moon Dice"
Women: "John, the kids are watching"
One of the terms used for Crystal Meth. Roleplayers after a DnD session used to hit the Moon Dice to see what new Characters they could create.
"Bro please tell me you brought the Moon Dice, I need to make a new Wizard."