mališa

1. affect. little one; kid; tot
   Mališa je ceo dan trčao po parku. — The little one ran around the park all day.
   Njihov mališa je napunio tri godine. — Their little boy turned three.
2. colloq. (as a form of address) kid; little man
   Slušaj, mališa, ovo nije za tebe. — Listen, kid, this isn't for you.

The word is masculine despite ending in -a: naš mališa je bolestan.