flattie noun a non-Traveller; a house dweller: He worked at a factory in Aiberdeen and he liked fit-ba and times he would mate aboot with the flatties and sometimes spake [spoke] like them. 20-. etymology: perhaps a diminutive from ‘flat dweller’; seems only to be found in the language of Scottish Travellers; attested by SR and DW note:

This term is also used by Showmen and women (travelling fairground people) to mean a person who is not part of their community, an outsider.