From The Oxford English Dictionary:
Hogs Norton, n.
. . . .
A fictional town renowned for its uncultured and boorish inhabitants; often in (depreciative) phrases suggesting that someone is a native or inhabitant of this town.
. . . .
1725 N. Bailey tr. Erasmus Colloq. 317 You saucy Fellow, where was you drag’d up, At Hogs Norton?
Link to the rest at The Oxford English Dictionary
Thus, Hogs Norton = Podunk.