pederski

1. vulg. derog. faggy; homosexual
   Rekao je da je to pederski klub. — He said it was a fag club.
2. vulg. derog. slang (as a general insult) gay; sissy; lame
   Nazvao je moj roze šal pederskim. — He called my pink scarf gay.
3. vulg. derog. slang (of an act) underhanded; dirty; treacherous
   To što je uradio bio je pederski potez. — What he did was a dirty move.

A crude slur; the neutral words are gej or homoseksualni.