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1. Tankass
A posterior so large, it is able to sustain the blow of an artillery shell.
Have you seen J-Lo's new video? Jesus christ she has got some kind of Tankass.
by anonymous Feb 7, 2003 share this add a video
2. tankass
An ass so huge that strikes back when you insult it.
Tara Bichard is a tankass!
3. tankass
A generally unattractive rear end as a result of wideness.
Man, that girl went off to college and got tankass.
4. tankass
Tom Crankshaw
holy shit tankass u need to warn sum1 when relesing gas from the ass! man......
by Ali P Mar 17, 2004 share this add a video