An "outie" is a term used to describe a type of belly button that protrudes outward from the abdomen. This is in contrast to an "innie," which is recessed. Outies can occur due to various factors, including the way the umbilical cord was cut at birth or how the body heals after the cord detaches. Outies are generally considered normal and do not indicate any health issues. They can vary in size and shape, just like innies. Some people may prefer one type over the other for aesthetic reasons, but both are natural variations of human anatomy.