brijati

1. to shave
   Berberin mu brije bradu svakog petka. — The barber shaves his beard every Friday.
   Leti brijem noge skoro svaki dan. — In summer I shave my legs almost every day.
2. (brijati se) to shave
   Brijem se ujutru, pre posla. — I shave in the morning before work.
   Već nedelju dana se ne brije. — He hasn't shaved for a week.
3. colloq. (of cold wind) to bite; to cut like a knife
   Obuci se toplo, napolju košava brije. — Dress warmly, the košava wind is biting outside.
4. slang (usually mistakenly) to think; to fancy, to imagine
   Brije da je najpametniji u društvu. — He thinks he's the smartest one in the group.
   Briješ da će ti oprostiti? Nema šanse. — You think he'll forgive you? No chance.
5. slang (brijati na nešto) to be into something; to be crazy about something
   Trenutno brijem na stare jugoslovenske filmove. — Right now I'm really into old Yugoslav films.
   Na šta briješ u poslednje vreme? — What are you into these days?

The perfective is obrijati. In youth slang brijati means 'to think, to imagine (usually mistakenly)', and brijati na nešto means 'to be into something, to be crazy about something'.