Body contouring with fat grafting is your answer

Hipless,

Based on your description, a body contouring procedure utilizing liposuction to "harvest" fat from unwanted areas and place it into areas of the body for the purposes of enhancement falls under the category of "fat grafting"  This procedure uses a patient's own fat to contour the body and improve aesthetics.  In general, this is a far better procedure for body and buttocks contouring than the use of implants.  Find a surgeon who is familiar with this technique and can demonstrate results through before and after photos that will give you the confidence to proceed.

Good luck.

Dr. Sean Simon