outsider

/ˌaʊtˈsaɪdər/
noun
  1. A person who does not belong to a particular group, community, or organization.
    • He was always an outsider in the political party because of his unusual views.
    • As a new student, she felt like an outsider in the first few weeks of school.
    • The small town was suspicious of any outsider who moved in.
  2. A person or thing that is not expected to win or succeed, especially in a competition.
    • Many people love to root for the outsider in a sports tournament.
    • In the horse race, the outsider came from behind to take first place.
    • The young boxer was considered an outsider, but he won the championship.