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2.
Noun: A player-character, typically in a MMORPG, that is able to occupy an agressor and take the brunt of the aggressor's attacks while the other players deal damage, heal, or perform some other action. The "tank" can survive longer while taking damage than the other characters. Typically, the tank has higher hitpoints (health) and a higher armor rating than the other characters. Less commonly, a character with a lower armor rating can perform the actions of the tank by using avoidance abilities. Ultimately, the tank needs to be able to occupy the agressor without dying. The method employed, whether avoidance or absorption, does not matter, as long as the tank can mitigate damage in some way.

Verb: To "tank", or "tanking", would be the action of performing the duties of the tank as described above.
1.N. That warrior is a good tank because he can take a lot of damage and he has a lot of hitpoints.
2.V. The warrior is tanking the mob right now.
3.V. Do you think you can tank this mob for us?
by Ignotus September 02, 2005
 
57.
A large black man with an exceptionally large penis.
Latrelle on White Chicks is tank.
by Latrelle Spencer July 10, 2008
 
58.
An exclamatory remark of a gamer when he blows a guys head off in any shooter game, or what happens to my friend lance when he plays me at halo 3.
Guy 1: Dude watch out he's around the corner!
Guy 3: Im gonna get you!
Guy 2: Don't worry that bastard is on lock down.
Guy 3: God Damnit!!
Guy 1&2: TANK!!!
by Radshack6695 March 25, 2008
 
59.
A ferociously muscular human. Often used like machine. Good for rewarding accomplishments.
Izzy is a tank!
Findlay liften that car all by herslef, what a tank!
by Jaimison February 21, 2007
 
60.
Any vehicle, which despite being in numerous wrecks, fenderbenders, and crashes, still runs.
"Dude, My 240sx is a tank. has been in like 5 crashes, and it still runs!"

"That car is a tank. Its been flipped 4 times, hit a guardrail, a deer, and a fencepost! And I drive it everyday..."
by 240-is-go! November 07, 2006
 
61.
The act of removing a toilet tank lid, standing on the seat, and taking a dump in the tank of a toilet so the next person who uses it flushes out shit.
"Man, they fucking fired me so I tanked that fucking toilet on my way out!"
by lithos July 11, 2006
 
62.
a tank is someone who gets high as shit and gets the munchies and starts eating so much food while he laughs.
yo tank chill out, thats your second pizza.
by Pat Weitzman February 15, 2005
 
63.
The act of having forceful sex
"i tanked that bitch last night"
by peter April 08, 2004