odrađivati

1. (of work, a task) to do; to carry out
   Ove nedelje odrađujem noćne smene. — This week I'm doing night shifts.
   Bend leti odrađuje svirke po celoj Srbiji. — In summer the band does gigs all over Serbia.
2. colloq. to go through the motions
   On ne voli taj posao, samo ga odrađuje. — He doesn't like that job, he just goes through the motions.
3. (of a debt) to work off
   Mesecima je odrađivao dug kod komšije. — For months he was working off his debt to the neighbour.

The perfective is odraditi; in speech it often replaces obavljati.