Γαλικανός

From LSJ

τραχὺς ἐντεῦθεν μελάμπυγός τε τοῖς ἐχθροῖς ἅπασιν → he is a tough black-arse towards his enemies, he is a veritable Heracles towards his enemies

Source

Spanish (DGE)

-ή, -όν gálico, galo πλῆθος Orac.Sib.5.203.