GM

Stands for Game Master. Its A nickname for the Police used by game players. Also called Moderators.

Yo its the GM's, ditch the fuckin pipe or they will ban it.

by Lance Samson December 8, 2006

gm

Shorthand for Grandma or Grandmother

My gm had to go to the hospital yesterday.

by Scott Wu May 24, 2005

GM

abbreviation of "Generic Mexican". Those girls and guys who wear the stretchy headbands, big t-shirts, capris, big shoes with the tongue sticking out all the same color. They act the same, talk the same, walk the same, they are the same! Can be seen in both genders and multiple ages from 5-50. It is a virus people.
* White people can be GM's as well.

Morty: Wow that girl Kelly is white but she's ghetto...
Northrup: dude she's a GM and a GM lover!
Morty: oh..

by Addicted to Coca-Cola and Cheese December 28, 2008

GM

good morning
a phrase used for an abbreviation of the common greeting often used in chatrooms

Boy: Gm sexy
Girl: Gm?
Boy: Oh sorry its morning here. Good evening to you

by elloese May 2, 2014

GM

To cap out a skill in a game, or raise a skill to it's highest level. Also-- Grandmaster.

Originally from certain MUDs, but widespread use began with Ultima Online.

I just GMd my Fletching, Smithing, and Tailoring. Now I can go outside and possibly learn what this 'female' thing is I keep hearing about.

by Fetch April 27, 2004

gm

In a course of a conversation, one may say things that annoy the other, or say things that are true and the other person doesn't want to face that truth, so they respond with "gm".

Martin: "So, did you finish this English homework?"
Robin: "No."
Martin: "Why not? Too lazy to use your concious mind and get some primitive ideas down on paper?"
Robin: "gm, Martin, gm."

by Martin Luptak January 12, 2006

GM

Good Mannered, a term most people use now a days online when they don't want stupid ass people going into their channels on B.Net going "YOU SUCK DICK..." etc. etc.

Player 1: Hi, are you GM?
Player 2: FUCK NO
Player 1: Oh, then I don't want to game with you sorry...
Player 2: STFU nerd!
Player 1: >kick Player 2 manner please
Player 1 has kicked Player 2 out of the channel.

by Frank G. November 20, 2004