A Brazilian Butt Lift, also known as a BBL, is a cosmetic surgery procedure that involves transferring fat from other areas of the body, such as the abdomen, hips, or thighs, to the buttocks to enhance their shape and size. The procedure is performed under general anesthesia and involves making small incisions in the target areas to remove the fat and then reinjecting it into the buttocks. A Brazilian Butt Lift is typically performed as an outpatient procedure and takes several hours to complete.