A “butt lift” is a procedure under body contouring. To get wider hips or a rounder butt, a plastic surgeon will use liposuction to remove fat from one part of your body, refine it and then re-inject it into another part of the body by way of fat grafting. By removing fat and adding fat to different places on the body, the plastic surgeon can get a desired effect like wider hips or rounder butt.