manijak

1. maniac
   Policija je uhapsila manijaka koji je napadao žene. — The police arrested the maniac who had been attacking women.
2. colloq. (manijak za + acc.) fanatic; nut
   Moj brat je manijak za fudbal. — My brother is a football fanatic.
   Ona je pravi manijak za red i čistoću. — She's a real neat freak.
3. colloq. (of a driver) maniac; reckless driver
   Neki manijak me je pretekao na punoj liniji. — Some maniac overtook me across a solid line.
4. colloq. derog. (of sexual behaviour) pervert; sex maniac
   Roditelji su upozorili decu da se u parku pojavio neki manijak. — Parents warned the children that some pervert had been seen in the park.