raskidati

1. (of relations, contracts) to break off; to terminate; to break up
   Danas mladi parovi često raskidaju posle nekoliko meseci. — These days young couples often break up after a few months.
   Firma raskida ugovor sa dobavljačem. — The company is terminating the contract with the supplier.
2. to tear apart; to tear to pieces
   Vukovi su raskidali ulovljenu srnu. — The wolves were tearing apart the deer they had caught.

To break up with someone is raskidati sa + instrumental: raskida sa devojkom.