seljački

1. peasant; rural
   Na pijaci kupujem seljački sir i kajmak. — At the market I buy farmhouse cheese and kajmak.
   Deda je ceo život živeo seljačkim životom. — My grandfather lived a peasant's life all his life.
2. colloq. derog. (of behaviour) boorish; uncouth
   Bacati smeće kroz prozor je baš seljačko ponašanje. — Throwing rubbish out of the window is really uncouth behaviour.

3. colloq. derog. boorishly; rudely
   Nemoj da se ponašaš tako seljački u restoranu. — Don't behave so boorishly in the restaurant.

In everyday speech the word is often insulting, even when it has nothing to do with the countryside.