vol

1. Croat. ox
   Volovi vuku kola. — The oxen are pulling the cart.
   Jak je kao vol. — He's as strong as an ox.
2. Croat. derog. (of a person) dimwit; oaf
   Ne budi vol, slušaj što ti govorim! — Don't be an oaf, listen to what I'm telling you!

In Serbia the word is vo.