Ommi, ummi, omi - internal hip circle
This is a lovely controlled movement, best described as an internal hip circle because the hips do not extend beyond the body-space. Check out this video clip for one interpretation of an Ommi:
http://www.youtube.com/watch?v=ylH9LgInOQ0&NR=1&feature=fvwp
http://www.youtube.com/watch?v=ylH9LgInOQ0&NR=1&feature=fvwp