servus

1. Croat. colloq. (when meeting) hi; hello
   Servus, Marko! Kako si? — Hi, Marko! How are you?
2. Croat. colloq. (when leaving) bye; see you
   Moram ići, servus! — I have to go, bye!

In Serbia people say zdravo or ćao; in Vojvodina the variant serbus is also heard.