Green’s Dictionary of Slang

(US) rustic, rural.

1926		Wood & Goddard Dict. Amer. Sl. 12: country. Hicksville; rustic.
1952		C. Himes Cast the First Stone 112: The toughies who had nothing but their outside reps got their throats cut by hicksville punks who had never heard of them.
1976		P. Conroy Great Santini (1977) 62: This town is hicksville.
2004		Age (Melbourne) 18 Apr. 🌐 All the hicksville drivers the police have caught doing doughnuts and blowing black smoke all over the nicer people’s clothes.