buncati

1. (in illness, in sleep) to be delirious; to rave
   Dete je celu noć buncalo od groznice. — The child was delirious with fever all night.
2. colloq. to talk nonsense; to babble
   Ne slušaj ga, on samo bunca. — Don't listen to him, he's just talking nonsense.
   Šta to buncaš? — What are you going on about?