Definitions for "Flatlander"
Flatlander is a term used in Larry Niven's Known Space series, initially to describe one who has never left Earth. In later stories, it is apparently expanded to refer to anyone who has never traveled off their native world (but not for one who was born in a colony or space station, and never left it). The term comes from the fact that, from the surface, a planet seems flat.
Larry Niven's short story "Flatlander," published in 1967, is the third in the series of Known Space stories featuring crashlander Beowulf Shaeffer. The short story was originally published in Worlds of If, March 1967, and reprinted in Neutron Star, Larry Niven, New York: Ballantine, 1968, pp. 129-171 (ISBN 0-345-29665-6), and Crashlander, Larry Niven, New York: Ballantine, 1994, pp. 57-101 (ISBN 0-345-38168-8).
Keywords:  loper, troll, peninsula, lower, person
A person from the lower peninsula (see also "Loper" and "Troll").
A slang derogatory term for someone from downstate.
Term of contempt for someone that was green or new to the mountains.