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1.
The odd collection of sub-languages of English that define the worlds and mechanics of various tabletop, console and computer roleplaying games. Most of these sub-languages are indecipherable by someone who has never heard of or has not played the game.
"We need two more DPS for this raid. The boss is epic hard on heroic and if their raid awareness is bad we're all going to wipe."

"What the hell did you just say? Are you spouting Gamerspeak again?"
by The Pagan Den Ma August 28, 2013