flatlander

noun14

1. •
   (US) Anyone from the East; anyone from outside the Rockies.

   • Ahead stretched the great Rocky Mountains. For this family of Iowa flatlanders, it was a spectacular sight. — 2003
2. •
   (disapproving) A person who lives at, lived at, or was raised by someone at a low altitude or from any city. A person not raised in or by someone directly from high mountain areas. (used by those who were born, raised, and are still living in higher altitude non-city or city like areas).
3. •
   (Appalachia, disapproving) Any outsider to Appalachia.

   • […] the mountain folk, as a group, much more frequently opposed the "flatlanders." — 1991
4. •
   (Appalachia, disapproving) Anyone from southern Pennsylvania (particularly around Philadelphia), New Jersey, or other low-lying areas outside the Alleghenies / Appalachians.
5. •
   (disapproving) Any non-native, but particularly one from southern New England (including Massachusetts), downstate New York, or New Jersey.
6. •
   (disapproving) Anyone from Wisconsin.
7. •
   (disapproving) Anyone from lower Michigan (those south of Mt. Pleasant).
8. •
   (disapproving) Anyone from Indiana or Ohio.
9. •
   (disapproving) Anyone from Illinois.
10. •
    (Canada, disapproving) Anyone from Saskatchewan.
11. •
    (disapproving) Anyone from Florida.
12. •
    (disapproving) Anyone from Umina.
13. •
    An inhabitant of or observer in a universe with two spatial dimensions.

    • The perceptual acts of the two-dimensional flatlander are seen by the projective Euclidean eyes as funny, [...] — 1979
14. •
    A flatland BMX rider.