Taking a shit with such force that your shit gets stuck to the back of the toilet.
Mann, I ate so much beans, I had tank ass all morning. I tanked so hard I almost ruptured a hemorroid!!!
by hemy January 24, 2008

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An ass so huge that strikes back when you insult it.
Tara Bichard is a tankass!
by Wes Morris September 17, 2003

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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 29, 2010

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A very large and substancial glutious maximus. Like a tank is to a car -- a Tank Ass.
"Look at that softball player, she has a Tank Ass."
by Schammy October 11, 2006

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An ass so large that is causes the bearer to commonly be late to work.
Can you believe that tank ass Craig was late again!?!
by mohlerman August 18, 2011

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A generally unattractive rear end as a result of wideness.
Man, that girl went off to college and got tankass.
by The S Diddy August 12, 2003

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Tom Crankshaw
holy shit tankass u need to warn sum1 when relesing gas from the ass! man......
by Ali P March 17, 2004

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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