jajce

1. regional colloq. (in southern dialects) egg, little egg
   Baba u Vranju mi svako jutro skuva jedno jajce. — My grandma in Vranje boils me an egg every morning.
   Dete je našlo jajce u kokošinjcu i donelo ga u kuću. — The child found an egg in the henhouse and brought it into the house.
2. vulg. slang (usually plural jajca) testicle, ball
   Udario ga je kolenom pravo u jajca. — He kneed him right in the balls.

Diminutives of jaje include jajašce and jajce. In southern dialects (Niš, Vranje, Pirot) and in Macedonian, jajce is also used as the ordinary word for an egg. Colloquially, the plural jajca can mean 'balls' (testicles) and is vulgar in that sense.