The word "butt" refers to the rounded or fleshy part of the body that is the lower rear section, which is commonly called the buttocks. It can also be used informally to denote the act of pushing or striking with the head or the part of an object. In some contexts, "butt" can also refer to a person who is the subject of ridicule or criticism.
The word "butt" originates from the Old French word “butte,” which means a mound or hill, and is derived from the Latin word “buttis,” meaning a cask or barrel. The specific sense related to the human body emerged in the late 19th century.