From Wiktionary, the free dictionary
From pun + kurac; literally "full dick".
pun kurac
- (vulgar, slang) shitload, fuckload (of something)
- Imaš pun kurac slatkiša, podijeli sa mnom, ne budi škrt! - You have a fuckload of candy, share it with me, don't be stingy!
- Koliko treba krvi za erekciju? Pun kurac.