1)A term used in MMORPG's, meaning the best tank in a massive group who is questing. There responsealbilitys includes building aggro and taking dmg.
2)V: a term using when doing well or dominating in any game.
1)"Bitch I'm main tank i can do whatever i want."
2)"I am main tanking so hard right now. No homo"
Beast. See Landen.
Dude, you are such a main tank!