D20

Before TSR/Wizards of the Coast tried to trademark "d20", every gamer knew what the fuck an icosahedron is, and why "natural 20" is a gift from God.

BOW DOWN BEFORE YOUR GOD

2nd century Rome, bitches

The d20 System for role playing game later. Like eighteen centuries later. Don't believe me? Look over there.

Even camwhores know that the d20 is sexy, and each face has an exactly 5% chance of appearing.

from Nerdpron.com before it died