lajavac

1. colloq. derog. (of a person) loudmouth; blabbermouth
   Ne pričaj mu ništa, on je veliki lajavac. — Don't tell him anything, he's a big blabbermouth.
   Na sastanku se opet čuo samo onaj lajavac. — At the meeting again you could only hear that loudmouth.
2. (of a dog) barker
   Komšijin pas je pravi lajavac, laje celu noć. — The neighbor's dog is a real barker, it barks all night.