GMB 

stands for gold mystery box in pet society, which is really called expensive mystery box but nobody cares. it may contain 999s or junk, but most of the time it contains junks.It was used for trading in pet society forum before playfish fixed the "refresh glitch".

psaddict1:hey what did you get from the gmb?
psaddict2:mayor doll.
psaddict1:fail.

GMB by iamthemayor March 21, 2010

GMB 

Stands for: Gold Mystery Box, in the PlayFish game, PET SOCIETY.

It's worth 500 Pet Society coins, and is commonly used in various trading forums as currency, for buying items.

A: "Wanted: A Teddy Bear"
B: "I have one. Sell it to you for 3 GMB :)"

GMB by urulokei January 27, 2009

GMB 

Acronym for Give me a Break. Or Gimme a Break.

Person #1: Well you're on the schedule to work 1-5.
Person #2: I understand that but it's dead and the last table i had was at 2. And Whimsy is here 'cause her shift started at 4.
Person #1: But you have to stay until 5.
Person #2: GMB!

GMB by ClassMart35 March 16, 2009

GMB 

Typically used when shouting out someone on socially media and means “get me back” when doing a shout for shoutout to follow them back

Aye follow @xyz (gmb)

GMB by Blxsian May 29, 2019

GMB 

Ganja Manja Banja

Let's smoke that GMB

GMB by Naqueef February 25, 2020

GMB 

Get money bitch

Ayo ur poor GMB

GMB by Ogoddamn November 15, 2020

GMB 

When ever you don't feel like typing out gay man baby so you type in GMB

Person one: You are an idiot!
Person two: Ughhhh! stop being a GMB!

GMB by Werddrewtv January 19, 2021