The act of removing a toilet tank lid, standing on the seat, and taking a dump in the tank of a toilet. Best done in public restrooms, always a crowd pleaser at the office too.

Also known as the Upper Tanker, 2000 Flushes Brown, Upper Decker, Going Up Top, and The Gift That Keeps On Giving. For a nice twist on this see Upper Deck Deluxe.

"Man, they fucking fired me so I tanked that fucking toilet on my way out!"
by sirbrutus July 12, 2006

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Someone, usually a warrior, who takes hits in a role-playing game so the more powerful mages can wordpwn the monster
I need a tank so I can take on the level 150 black dragon.
by pur1337 October 08, 2003

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A common term in Texas and surounding states for a manmade lake.
Let's go swimmin' in the tank.
by Wonderboy April 21, 2003

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Verb. To take a flying leap into waters of unknown depth, landing in a belly flop with your arms stretched wide, and legs together.
Tank: *Splash*
Tallan: "Dude you just totally invented Tanking!!"
by miniLeader August 08, 2011

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smartass, shit talker, jerk face
I love to be a Tank!
by Butterfly Bird January 07, 2011

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tank means a big container, normally used to store water.

tank is also an expression for a big / chubby / fat person, normally used for a woman
pol: illustja dik tank qahba madoffi xini hoxna.
dik tajba al kekke.
by plapol April 02, 2008

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Someone who is very good at something, wanting nothing except perfection, unstoppable.
You got 100% again Sheila? Man, you're such a tank!!
by 9-3er August 09, 2005

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