IronSamKidd

I use con to mean "what threat level color is the monster to you?", mostly used in hunting groups, as in:

Lvl20 = "What does X monster con to you? It cons green to me."
Lvl15 = "It cons purple to me."

Also, there is the role of nuker, which is someone that deals heavy damage, usually ranged, but can't tank well. The Blaster class is almost synonymous with the general term nuker. This is generally a spell casting class in other mmorpgs.

LFG = Looking for group. As in: "L10 tanker LFG" = "Level 10 Tanker looking for someone to group with". See LFT.