look up any word, like ratchet:
 
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
 
8.
verb: meaning to fail
I really tanked that exam
by plant ice February 25, 2005
 
9.
To rush through and/or demolish someone/something with a large amount of force and power
4 idiots ran to me and i TANKED them to the ground one by one
by aaaaaaaaaaaaaaaaaaaa August 16, 2007
 
10.
(n.) 1. Profanese variation of "thanks". Used to express gratitude, very rare to hear from Profanese.
"Tanks."
by Razukin December 01, 2002
 
11.
To deliberately lose a sporting event or contest, esp. with the intention of gaining some future advantage (such as a higher selection in an upcoming draft, etc.)
The NBA lottery was implemented in the 1980s so that non-contending teams would have less incentive to "tank" games at the end of the season in order to secure the top pick in the following summer's draft.
by Anthony Brancato April 19, 2003
 
12.
1) A storage container.
2) The modern equivalent of a siege engine.
2) Someone who is strong and/or physically imposing.
3) In roleplaying games, a melee damage-dealer (or to act as one).
1) There's a leak in the water tank.
2) My brother drives a tank in the army.
3) Is your sister still dating that tank of a football player?
4) LF tank for ZF run.
by Qit el-Remel December 27, 2007
 
13.
Noun or Adjective, depending on usage

Noun: Someone or something that is cool, sick or beast

Adjective: Cool, awesome, sweet
Noun: Dude, that guy just 3 home runs and was voted the MVP! What a tank!

Adjective: That new pair nikes is pretty tank!
by epxc33 July 21, 2011
 
14.
An old beat-up car that's rusting, blows smoke, and has dints and bangs all over it.
Dude, where did you get that old tank? The junk yard?
-My grandfather gave it to me.
by Kal-EL777 May 11, 2008