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a.k.a. "The GM is always right."

The unwritten rule in tabletop role-playing games (such as Dungeons & Dragons) which grants the game master the right to suspend or override the published game rules whenever s/he deems necessary.

Similar to a house rule; however, rule zero may be invoked unilaterally, at any time and does not have to be agreed upon in advance by the players.

When abused, can lead to an inconsistent, confusing, or frustrating experience for the players.
Bob: I climb up the wall and into the wizard's castle, bypassing the defenses. I rolled a 20, so I succeed.
GM: The wall is magically warded against climbing. You fail.
Bob: But a 20 is an automatic success!
GM: Rule 0. You fail.
rule 0 by bigwhitespats November 2, 2009
Related Words
0 007 :0 00 010 0b0t 0w0 000 00's 030

Download Version 2.0 

Uh-oh. Can we stop by the computer lab real quick? I need to download version 2.0

`~1!2@3#4$5%6^7&8*9(0)-_=+qwertyuiop[{]}\|asdfghjkl;:'zxcvbnm,<.>/? 

When you are in school and type every character on the keyboard and can't find it on urban dictionary so you add a definition
Joe: I'm bored
Jeff: Type qwertyuiopasdfghjklzxcvbnm
Joe: I did that
Jeff: Than type mnbvcxzlkjhgfdsapoiuytrewq
Joe: I did that also
Jeff: Than type `~!@#$%^&*()-_=+{}\|;:'",<.>/?
Joe: I DID THAT
Jeff: Than type `~1!2@3#4$5%6^7&8*9(0)-_=+qwertyuiop{}\|asdfghjkl;:'zxcvbnm,<.>/?
Joe: Okay
Its an angry mustachio'd man. Don't f with him, he bites. Hard, like a shark.
Steven - Dude, whats good?

Gabe - >;^{0

Steven - Oh no! I'm outta here
>;^{0 by SnoopNubbyNub January 25, 2010
Most commonly used to refer to Police Officers/detectives or anyone associated with law enforcement. Origins date back to an early 1970’s television series titled “Hawaii Five O”. Detectives on this show were assigned to a special unit (Five O) and were savvy, aggressive and always apprehended the suspect. Much like the character “Daisy Duke” from the Dukes of Hazard television series whose short shorts spawned a once popular clothing trend with women very effeminate men, the term 5 0 too has transcended television to urban slang.
1. Say man. The block is hot so we goin to post up at Man Man’s cause 5 0 ain’t lettin a mother fucker make no mony here.
2. 5 0 came and took my baby daddy cause his P.O say he had weed in his pee and he on paper.
5 0 by a.g.c. June 23, 2007
congrats if you find this
o_0 by also me too September 9, 2020