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
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GM

Any of a line of engineering abortions produced for the last hundred years or so. Similar to a medieval torture device, but without the quality. Any automobile belonging to the fecal genus.
My GM is such a steaming pile of feces, I can't bring my self to spend $10 on a car wash.
or
How unusual, there is a GM that still runs.
by Jeff March 12, 2004
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GM

Stands for General Motors. Often used in shorthand as an umbrella term for its several brands (Chevrolet Pontiac Oldsmobile Buick Cadillac Holden Hummer Saturn GMC) etc.
Friend 1: I just got a Chevrolet Chevelle!
Friend 2: ugh more GM junk... Whatever floats your boat I guess
by Welldavis December 07, 2021
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GM

Good automotive value for the money. Those who think otherwise are too busy spewing liberal bullshit to realize it. Down with the clowns.
Counter-example: Neil
by Robert Lutz January 13, 2004
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GM

A Game Master or in Anarchy Online, a Genetic Manipulator which sounds gay.

Basically this being is rude, nasty and avoided at all costs. They think they know how to play the game but they have no idea at all, in fact some, especially in Anarchy Online are only learning how to be rude and totally lame there, before they move to the next Funcom failure, Age of Conan.

player:'Oh god I need to petition as I've lost a backpack'
GM: 'fuck off'

player: 'I'm being harrassed help me please'
GM 16hours later : 'fuck off bullied noob'

Player: ' Can you tell me how to trade as I am really new and I want to know more about Anarchy Online?'
GM: 'fuck off you total noob'
by Esther Hardwick October 24, 2006
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GMS

acronym for Grand Master Siddiqi. this title was first given given to the brown pakistani kid who goes to west orange high school by an afghani kid who is less brown. this can be given to any person from pakistan who is surrounded by a mystical aura of islamic awesomeness or to anyone who doesn't deserve to be annoyed deeply for no apparent reason.
Oooo!!! The GMS graces us with his presence!!! (spoken in deep arab accent)
by yellow japanese kid January 28, 2010
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GMS

by Trevor Davis 69 June 18, 2010
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