τραχὺς ἐντεῦθεν μελάμπυγός τε τοῖς ἐχθροῖς ἅπασιν → he is a tough black-arse towards his enemies, he is a veritable Heracles towards his enemies
subs.
P. ὑδροπότης, ὁ (Xen.).
Be a water-drinker, v.: P. ὑδροποτεῖν (Plat.).