seljanka

1. peasant woman; countrywoman
   Baka je bila prava seljanka, radila je u polju celog života. — Grandma was a real peasant woman; she worked in the fields all her life.
   Na pijaci seljanke prodaju sir i kajmak. — At the market, country women sell cheese and kajmak.
2. colloq. derog. hick; uncouth woman
   Ne viči tako, ponašaš se kao seljanka! — Don't shout like that, you're acting like a hick!

The masculine counterpart is seljak; in casual speech both can be used as insults.