A condition in which a woman has a normally proportioned body except her extremely large butt. It is frequent occurance in Massachusetts.
At first I found the cashier quite attractive, until she stepped out from behind the counter and I saw her mass ass.
1. a severe condition in which a woman's ass is out of proportion with the rest of the body.
2. a ass so big, even thinking about it will get you lost.
3. a ass so gargantuan, the only thing that gives definition is it's cellulite
4. Booty for days or ass for days--Ebonics
Rhinocop-I hooked up w/ Heavy D last night
Ian-What did you do?
Rhinocop-Yea i tapped that...
Ian-...You mean you got tapped by the mass ass