BM

BM may refer to:
 * Beast Mastery, a Hunter talent tree.
 * Exotic Beasts, the top tier talent in the talent tree.
 * Black Morass, the second instance in Caverns of Time.
 * Battlemaster, NPCs who handle Battleground queues.
 * Blademaster, an orc hero in Warcraft III: Reign of Chaos.
 * Blood mage, a type of magican