GM Brats 

General Motors workers who exhibit false sense of entitlement

Dang, those GM brats, they don't know how good they have it

GM Brats by non GM brat June 1, 2009

gm_construct 

gm_construct is a very scary map.

guy 1: ayo hop on gm_construct.

guy 2: nah that shit scary af

gm_construct by nexbo March 27, 2021

GM's 

Corrupt fuckers who take delight in unjustified bans.

GM: Hello
You: Hiho
GM: You are using an answering macro :O
You: WTF ?!
Gm:Thats right enjoy your vacation!
You: Adura vita
GM: Aha you are using a RUNE MAKING MACRO. 30 DAY BAN.

GM's by Dup November 30, 2004

GM Gypsy 

A career General Motor worker, who has to relocate several times because of plant closings to maintain their employment.

For those that cannot afford to travel, the GM Gypsy lifestyle is for those that cannot afford not to travel.

GM Gypsy by mlhiss September 9, 2019

gm_flatgrass 

A map on the popular half life 2 mod

garrys mod, it contaons a large field with small mountains in the distance, it also contains an arch like structure in the middle of it containing a secret room.

"Hey wanna go build a spaceship in gm_flatgrass?"

gm_flatgrass by Gordon feetman January 27, 2021

GM Fiat 

The GM is always right. No matter the Dice rolls he wins, The GM always wins

Player: W00t! I rolled a crit again! your Dragon is dead in two hits!
Gm: No it isn't.
Player: What? Why not?
Gm: GM Fiat...
Player: damnit!

GM Fiat by Arimmus October 19, 2010

gm me 

'GM me' means 'gamemode me'. Players of Minecraft will say it (in chat) to the player whose opped (in a server) to change their gamemode as only the opped player(s) can change it. There are 3 gamemodes in Minecraft; Survival, Creative and Adventure mode. Generally 'gm me' is asked when a player wants to change to creative.

In chat

Player: gm me
Oppedplayer: k
Oppedplayer: /gamemode player 1
Player now in creative mode

gm me by Meinkraft Player September 7, 2013