It's not dark Speech, but it will help you not to be so lost when your in the presence Eliteness.

1H / 2H: one handed and two handed weapons.
Add / Adds: one or more monster or into the fight.
Aggro: is the invisible area sorrounding a monster where he will start attacking you. This varies depending on level and weapons.
Alt: another character from the same player. For example: I play a hunter, my alt is a minstrel.
AoE: Area of Effect. When a skill or item deals damage to an area and not to a single npc, monster or character. Example: fire.
BoA - Bind on Aquire
BoE: Bind on Equip. The item will be bound (you will be not able to sell it) once equipped.
BoP: Bind on Pick Up. the item will be bounded to you once you purchase it.
Buff: a temporary increase in one or more stats... for example by eating food or using a skill.
CC:Crowd Control, a set of skills that allow players (Lore-Masters specially) to deal with more than 2 mobs at a time easily.
Crit: critical chance or critical. Related to crafting or critical hits (chance to deal more damage with a skill)
DoT: Damage over time. An effect from a skill or item that deals damage through a period of time.
DPS: Damage Per Second. A way of measuring the damage from weapons.
Dread: a modifier to your stats. Generally decreases a percentage of your skills down.
Drop Rate: the frequency a mob drops an item.
Exploit: a flaw in the game that allows to cheat.
FM: Fellowship Maneuver, also called Conjunction.
Instance: a part of the game world that is private for a group or individual. Other players getting into the instance will have their own game experience separated from each other.
LFF: Looking for Fellowship. You are alone and you are looking for a group.
LFM: Looking for More. You already have a fellowship and you are asking for more to join.
Lore: the story and history of the game world.
MA: Main Assist. The person in a fellowship that assists (hits) mobs to defend and support other players... or Tank.
Mats: materials for crafting, often refered to how many items and money required to craft an item.
Melee: close combat.
Mezz: to stun or freeze or stop a mob for a moment.
Mitigation: the ability to absorb attacks
MH: Main Healer. Normally a Minstrel and secondary classes that can heal at certain levels like Captains and Lore-Masters.
Mob: an NPC monster or creature.
Named: a monster or creature that stands among others. Usually a signature that has his own name and its unique among its species. Example: Sargurz, Karnasht, Silverclaw.
Need / Greed: the action taken when looting in a group.
Noob, Newby, l33t, N00b: an inexperienced player.
NPC: Non Player Character. A computer controled character: vendors, monsters, etc.
OMW: On My Way
Power Levelling: the action of doing quests and spending virtual money to get to higher levels faster.
PST: Please Send Tell. to send a /tell (private question).
PUG: Pick Up Group, a casual group.
Pull: the action to hit a mob to start a fight.
PvE: Playr vs. Environment.
PvP - PvMP: Player vs Player, Player vs Monster Player.
Raid: a combo of 2 to 4 Fellowships.
Regen: the process to regain morale and power (or other stats).
Reset: the action when a mob or NPC returns to its original state.
Rez: from resurrect. The action to bring back a character from being defeated.
RP: Role Playing
Spawn: the moment where a mob appears.
Tank or MT: the character inside a Fellowship that is supposed to take aggro and absorb the hits while other players try to defeat him.
TS: TeamSpeak a chat server or service
Vendor: an NPC that sells stuff.
WTB: Want to Buy
WTS: Want to Sell
WTT: Want to Trade
XP: Experience Points.
Vent, Ventrilo: hat server or system