The phrase "big butts" refers to having a large or ample rear end. It is often used in a complimentary manner, indicating that someone has an attractive and well-endowed backside. The size and shape of one's buttocks can be influenced by genetics, diet, exercise, and other factors. In popular culture, the phrase "big butts" has also become associated with a certain style of dance music known as "twerking," which involves shaking and jiggling the rear end in a rhythmic manner.