Pytlík (m)
In the vernacular the term is also used to signify "scrotum" and, more vulgar, it can also convey "balls", "bollocks", or "nuts".
Kuhač, Franjo Š. [Šaver]: Prilog za poviest glasbe južnoslovjenske: Gajde [Contribution to the history of South Slavic music: Bagpipes]. In: Rad jugoslavenske akademije znanosti i umjetnosti, knjiga L (Zagreb, 1879), p.69¹ (pytlíkem [instrumental (grammatical form)]; »Jireček).
ws (linguistics [➺ Dictionaries, &c.]).