an ass so large that if you tried to assram it your penis would not penetrate the rectum.
by sonny bono September 7, 2003
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A fat angry man who has the same body composition of, and design as an M1A1 Abrams battle tank. Except without workable treads. Has sat on the same pillow for the past ten years, contact will cause pink eye.

Spends his time eating mostly TV dinners and small children.
Josh Fien is a Tank Ass.
by The Truth Hurts Fien February 11, 2010
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the ass of a person who's sole reason for existance is to be a life support systems for said ass.
by Anonymous February 19, 2003
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A female with an gigantic rump. Usually an African-American....
Holy shit, did you see Tamika today? Dat bitch has got a tank ass.
by Act As If July 9, 2004
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Abnormally large buttocks typically found on outstanding Marine radio techs
Damn that Hafterson sure has a Tank Ass
by Fat Daddy Sass December 30, 2011
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