The scientific term for "butt" is gluteal region. This refers to the area of the body that encompasses the muscles and surrounding tissue of the buttocks.

The gluteus maximus, gluteus medius, and gluteus minimus are the major muscles in the gluteal region. These muscles play a crucial role in movement, stability, and posture.

While "gluteal region" is the preferred term in scientific contexts, other anatomical terms like nates, ischial tuberosities, and buttocks may be used depending on the specific context.