Minge is the British term of ‘vagina’. A.K.A: YOU FUCKING DOUCHEBAG! THAT DOUCHEBAG STOLE MAH DOUCHE SPRINKLER!
Garry used it in order to force people to actually change their names back then.
Just like how you’re seeing people with a monkey man scratching his nose as an avatar everywhere. It’s to promote people.
As time passes by in GMod7, there has been a noob’ery’ at a lot of multiplayer servers. Thrusters get removed by a bunch of players, ragdolls lying on each other’s crotches while frozen in the air like frozen bastards. The players of GMod decided to call this Garry’s Mod noob as a Mingebag, considering it’s a name used in case if you’re new to GMod. So it makes you a newbie or a noobie.
People nowadays will no longer have that name(if they do, they’ve done it on purpose) due to Garry’s Mod that is now using your Steam Community profile nickname just like Team Fortress 2.
Mingebags are terrible immature people walking in each server, their goal; to piss the mature players off.