country mouse

noun2

1. •
   (figurative) A countryperson; someone with country ways.
2. •
   (slang) A member of support personnel who travels around, rather than remaining at the base.

   • "[…] Maybe we'll run into some country mice." "Country mice?" "Some of the Mac-Town folks, out here on the ice. City mice stay at McMurdo, and country mice—" — 2023