English definition of “butt”
BOTTOM [C] US informal › your bottom: He just sits on his butt all day long.
CIGARETTE [C] › the end of a cigarette that is left after it is smoked: There were cigarette butts all over the floor.
GUN [C] › the end of the handle of a gun: the butt of a rifle
a head butt › when you hit someone with the top, front part of your head