The gluteus maximus (also known collectively with the gluteus medius and minimus, as the gluteal muscles, and sometimes referred to informally as the ‘glutes’) is the largest and most superficial of the three gluteal muscles. It makes up a large portion of the shape and appearance of the hips.
It is a narrow and thick fleshy mass of a quadrilateral shape, and forms the prominence of the nates.
Its large size is one of the most characteristic features of the muscular system in humans, connected as it is with the power of maintaining the trunk in the erect posture. Other primates have much flatter hips.
The muscle is remarkably coarse in structure, being made up of fascicles lying parallel with one another, and collected together into large bundles separated by fibrous septa.