1. General Motors, an automobile company.

2. "Game Master", one who runs, maintains, and/or referees an ongoing game (usually an RPG). Sometimes used to refer to the administrators of an MMORPG.

3. The arbiter of a tabletop roleplaying game. A broader term than DM or similar terms that are usually more specific to certain games.
1. I got my car at a GM dealership.

2. That stupid GM banned me from World of Warcraft!

3. I think my D&D group has the worst GM ever.
by Venatius July 11, 2005
Get the GM mug.
A Game-Master in a MMORPG
"Quit spawn-camping my corpse or I'm gonna get a GM to ban you."
by Wozan July 7, 2005
Get the GM mug.
Guy: GM sexy

Girl: GM. How is it going?
by bcsw September 28, 2009
Get the GM mug.
Stands for three things.

1. Good morning.

2. General Motors, a car company.

3. Game master, which is used for things like D&D.
1. gm e1!!

2. GM produces shit cars.

3. Our gm sucks.
by slendywantshis20 February 13, 2010
Get the gm mug.
General Motors. An auto manufacturer based in Detroit.
GM is the Microsoft of the auto industry.
by Qbert October 17, 2004
Get the GM mug.
Glamour muscles. Muscles that you work out that are only for looks - not for core strength.
From the show "it's always Sunny in Philadelphia" this is what Dennis called Mac's muscles - GM - Glamour Muscles - god dammit!

Dennis: Well, how the hell are you planning on getting in there, Mac?

Mac: Uh... you put me on the spot. First thing that comes to my head, scaling the façade. All right, I know I soured on that earlier, but I believe that is my mind telling me that I have it in me.

Dennis: Okay, I hate to tell you this, bro, but you do not have the core strength to scale the façade of Citizens Bank. You just don't.

Mac: What? I work out all the time!

Dennis: Yeah, but you only work out your glamour muscles, and you know it.

Mac: I work out my core.

Dennis: No, you do not work your core. You're totally arm-heavy. You're all bis and tris and everything else is just fat and-and ribs.

Mac: Bro, I can do way more push-ups than you, and that's like 16 different muscle groups, I think.

Dennis: That is beyond retarded, what you’re saying right now. edit
by Panther Pride August 31, 2010
Get the GM mug.