cabooty
A combination of the words caboose and booty, a noticably large and round ass that is generally attractive. Also refers to the display of such an asset through clothing or behavior.
Wow, that's quite a cabooty, looks like she's got melons under there.
or
Girl, those are cabooty pants, where you going tonight?
or
Girl, those are cabooty pants, where you going tonight?