BC
The Burning Crusade. This is the first expansion to World of Warcraft which added the Outlands and raised the level cap to 70.
TB
Thunder Bluff, home of the Tauren
Taunt
An ability that allows a player, usually a tank, to pull the attention of a monster off of another player and onto himself
Tap
To do damage to a monster, claiming it. Once you have damaged the monster, you are the only one able to get experience and loot from it. Also refers to Warlocks' ability Life Tap, which reduces health in return for Mana.
Tank
A character that is meant to hold the attention of the enemy while taking relatively little damage.
SW
Stormwind, home of the Humans
SV
The Steamvault, a Coilfang Reservoir instance in Zangarmarsh
Succ
Succubus, a DPS/CC pet used by warlocks. Can seduce, charming an enemy.
STV
Stranglethorn Vale, a zone in the Eastern Kingdoms
Strat
Stratholme, an instance in Eastern Plaguelands