Green’s Dictionary of Slang

unsophisticated, rustic and peasantlike.

1936		J. Curtis Gilt Kid 40: You came from the country some place. Not the real depths of the country, I know you’re not a swede-bashing judy.
1956		J. Curtis Look Long Upon a Monkey 186: He had to show the swede-bashing sods he was wide and knew his graft.