I saw the cutest skirt the other day. It was about 4 in. above the knees and on the tighter side, yet still "classy" looking. The back, however, had material that gathered around the, um, butt crack. It sorta reminded me of those thongs that make your butt look fuller: http://www.snaz75.com/bz-1175-sl.html

...except in skirt style. It accentuated the butt and gave a very nice hour glass figure look. What are these called, if they have a name?

Edit: I mean the skirts for outside the club. I found a link to "scrunch back skirts" for in the club.