bušiti

1. to drill; to bore
   Komšija opet buši zid u sedam ujutru. — The neighbour is drilling the wall again at seven in the morning.
   Ovde buše bunar već nedelju dana. — They've been drilling a well here for a week.
2. (of a ticket, ears) to punch; to pierce
   Kondukter buši karte putnicima. — The conductor punches the passengers' tickets.
   Gde se buše uši u Beogradu? — Where can you get your ears pierced in Belgrade?

For a single completed action the perfective "probušiti" or "izbušiti" is used.