Game Master: Someone who organizes, runs, maintains, and/or referees an ongoing game. This can be a videogame or a tabletop game, and is usually an RPG.
Larry: Yeah the weather today is pretty bad. Think it'll rain later tonight.
Bob: Yeah but iPhone 15 Pro Mak has 50% more battery.
Peter: Stop pulling a gm Bob.
means "good meat". first used by crypto artist Mark Wilson (a.k.a. diewiththemostlikes) it's an ironic approach to the good morning routines going on everyday NFT scene on X (formerly known as Twitter)