trubiti

1. (of a driver or car) to honk; to hoot
   Vozač iza mene stalno trubi. — The driver behind me keeps honking.
   Zašto svi trube na raskrsnici? — Why is everyone honking at the intersection?
2. to blow a trumpet; to play the trumpet
   Na Guči trubači trube danima bez prestanka. — At Guča the trumpeters play for days without stopping.
3. colloq. (about something) to trumpet; to go on about
   Mediji danima trube o toj aferi. — The media have been going on about that scandal for days.

In the figurative sense it is usually trubiti o čemu (o + locative).