d4 - A d4 is a four-sided die, like a pyramid, used in games when

A d4 is a four-sided die, like a pyramid, used in games when you're too lazy to roll a normal die.

D4 said, 'I don't roll normal dice, I roll d4s because I'm fancy.'

My d4 said, 'I use a d4 because it's more stylish.'

D4 used in a game and said, 'This is a d4, not a normal die.'