[Spanish, pl. of cojón, testicle, from Vulgar Latin *cōleō, *cōleōn-, from Latin cōleī, testicles, perhaps a colloquial variant of *culleī and akin to culleus, leather sack, probably a borrowing from an unknown Indo-European language of the Mediterranean and akin to Greek koluthron, ripe fig (perhaps originally "sacklike thing"), koluthroi, testicles, and koleon, sheath; see COLEOPTERAN.]