ciganiti

1. colloq. derog. (usually ciganiti se) to haggle; to drive a hard bargain
   Nemoj da se ciganiš, cena je već niska. — Don't haggle, the price is already low.
   Sat vremena se ciganio s prodavcem na pijaci. — He haggled with the seller at the market for an hour.
2. colloq. derog. (usually ciganiti se) to be stingy; to penny-pinch
   Ne cigani se on kad treba da časti društvo. — He doesn't penny-pinch when it's time to treat his friends.
3. colloq. derog. (nekoga, za nešto) to cadge, to pester for; to con
   Stalno cigani za cigarete. — He's always cadging cigarettes.

The word derives from an ethnic name and is considered offensive by many. Neutral alternatives: cenkati se for haggling, škrtariti for stinginess, moljakati / prositi for cadging, varati for cheating.