drot

1. slang cop
   Beži, eno drotova iza ugla! — Run, there are cops around the corner!
   Zaustavio me drot i tražio dozvolu. — A cop pulled me over and asked for my licence.
2. colloq. wire
   Vrata su bila vezana komadom drota. — The gate was tied shut with a piece of wire.

In the sense "police officer" the word is rather rude; the neutral word is policajac.