srpski

1. Serbian
   Volim srpsku kuhinju, posebno sarmu. — I love Serbian cuisine, especially sarma.
   Imaš li srpski pasoš? — Do you have a Serbian passport?

2. Serbian; the Serbian language
   Učim srpski već dve godine. — I've been learning Serbian for two years.
   Kako se to kaže na srpskom? — How do you say that in Serbian?

Written with a lowercase letter; 'in Serbian' is na srpskom, and 'to speak Serbian' is govoriti srpski.