švercati

1. colloq. to smuggle
   Godinama su švercali cigarete preko granice. — For years they smuggled cigarettes across the border.
2. colloq. (švercati se) to dodge the fare; to ride without a ticket
   Ne švercam se više, kazne su previsoke. — I don't ride without a ticket anymore, the fines are too high.
   Pola autobusa se šverca. — Half the bus is dodging the fare.

In the meaning "to dodge the fare" the verb is used with se.