bljuvati

1. colloq. to throw up; to puke
   Posle žurke je bljuvao celu noć. — He was throwing up all night after the party.
2. (of a volcano, smoke, fire) to spew; to belch
   Vulkan i dalje bljuje lavu i pepeo. — The volcano is still spewing lava and ash.
   Stari auspuh bljuje crni dim. — The old exhaust is belching black smoke.
3. (of insults, anger) to spew
   Stalno bljuje otrov na svoje kolege. — He's always spewing venom at his colleagues.

For vomiting the neutral word is povraćati; bljuvati is cruder.