Top definition
A 20 sided die used in many games in the "Dungeons & Dragons" series of tabletop role-playing board games.
Carl: Say Falacorn, let's break out the d20 and set us up a game of *gasp* DUNGEONS AND DRAGONS.
Joe: Indeed Yeldor, but I call dungeon master!
*slap fight ensues*
by Wesley Durrance July 21, 2005
Get a d20 mug for your friend Paul.
May 13 Word of the Day
lil mad is like big mad but the opposite, you mad but not mad to the extent of pullin somthin
"look im sorry i ate your food"
"is cool im just lil mad"
by lilbabiey November 30, 2018
Get a lil mad mug for your daughter Larisa.
2
A twenty sided die, or a system which has been used to base games off of. Also damages the Dungeon Master's walls after rolling low many consecutive times.
Player: Sonofabitch! Another 1?! How dare you betray me?!

*Throws d20 in a random direction as hard as he can*

Dungeon Master: Goddamnit Joe! That's the fourth time you've done that! I'm sure as fuck not paying if there's any damage!
by Kerik July 11, 2006
Get the d20 neck gaiter and mug.
3
1: A 20 sided die. 2: A gaming system devloped to play Dungeons and Dragons and other table-top RPGs.
1: Roll a d20.
2: We could play Star Wars d20 or Modern d20.
by Ryan March 02, 2004
Get a d20 mug for your daughter Nathalie.
5
The first open Liscense gaming system.

Yet another gaming system that held great potential but was ruined by over priced books , Unthought out rules, and market whoring.
Have you see the new d20 version of Cuthlullu
by Telos March 02, 2004
Get a d20 mug for your cat Abdul.
6
A 20 sided die to keep track of your life total in Magic, the Gathering.
Where is my d20, I need to keep track of my life total.
by McDutch July 16, 2008
Get a d20 mug for your cousin Trump.