Wiktionary
dirtsider
n. (label en science fiction often pejorative) Someone who lives on the surface of a planet or moon, as opposed to in space.
Usage examples of "dirtsider".
As far as the dirtsiders were concerned, space enjoyed the same kind of hands-off, lack of direct control that had been enjoyed by the people who, a half century earlier, had torn into the Amazon claiming they were finally opening it up to the twenty-first century.