white bread

/ˈwaɪtˌbrɛd/
adjective
  1. Plain, ordinary, or conventional; lacking excitement or individuality.
    • The movie was entertaining but a bit white-bread, with no surprises.
    • She wanted to escape her white-bread suburban life and travel the world.
    • His taste in music is pretty white-bread — just pop hits and nothing experimental.
  2. Relating to or characteristic of mainstream, typically white, middle-class American culture.
    • The show's humor felt too white-bread for a diverse audience.
    • He grew up in a white-bread family where everyone went to church on Sunday.
    • The neighborhood was very white-bread, with identical houses and manicured lawns.