butt dressed
As opposed to "butt naked," it's when someone is SO dressed. Dressed, up to their BUTT.
Mariya: Jacob and I touched tonight ... and he was BUTT, BUTT, BUTT DRESSED.
Butt cleavage dress
A dress that is cut so far down the back that it form cleaves where a woman's butt starts and makes it look like tit cleavage.
Kathy looks hot in that but butt cleavage dress.