AskDefine Define buttocks Printer Friendly. Bottom commonly refers to the human buttocks but also has other uses. The buttocks singular: buttock are rounded portions of the anatomy located on the posterior of the pelvic region of the ape s, including human s and many other bipeds or quadrupeds. Anatomy The buttocks are formed by the masses of the gluteal muscles or 'glutes' the gluteus maximus and the gluteus medius superimposed by a layer of fat. The superior aspect of the buttock ends at the iliac crest , and the lower aspect is outlined by the horizontal gluteal crease. The masses of the gluteus maximus muscle are separated by an intermediate gluteal cleft or "crack" in which the anus is situated.
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The buttocks singular: buttock are two rounded portions of the anatomy, located on the posterior of the pelvic region of primates including humans , and many other bipeds or quadrupeds, and comprise a layer of fat superimposed on the gluteus maximus and gluteus medius muscles. The two gluteus maximus muscles stabilise the hip joint and are the largest muscles in the entire human body; responsible for propelling the entire body forward when running and walking, ensuring the proper functioning of the entire leg. In many cultures, they play a role in sexual attraction. There are several connotations of buttocks in art, fashion, culture and humor, and the English language is replete with many popular synonyms that range from polite colloquialisms "posterior", "backside" or "bottom" to vulgar slang "arse," "ass," "bum," "butt," "booty," "prat".