someone connected with Swansea City Football Club, as a fan, player, coach, etc.
someone connected with the Sydney Swans, as a fan, player, coach, etc.
A surname transferred from the nickname.
A person of mixed racial or ethnic ancestry.
A mongrel dog (or sometimes cat); an animal of mixed breed or uncertain origin.
An idiot, a stupid person.
A person from the United States, in reference to sense 2.