[Jammin]

Some servers do have this setup.
I get the concept behind making this a slur, but I don't think the word is that big of a deal personally, being the brother of a mentally challenged man myself.
If it is used in a sneering way to address someone who is mentally challenged, I get it, but otherwise I think this is on the other side of "gamer talk" that is somewhat more appropriate.

I do very rarely use the term however, usually only when directed to @Raider Hanks