južnjak

1. southerner
   Ja sam južnjak, rođen sam u Vranju. — I'm a southerner, I was born in Vranje.
   Južnjaci su poznati po gostoprimstvu. — Southerners are known for their hospitality.
2. south wind
   Od jutros duva topao južnjak. — A warm south wind has been blowing since morning.

In Serbia it often refers to people from the south of the country (Niš, Leskovac, Vranje); the feminine is južnjakinja.