αἰγοκερεύς
From LSJ
Δελφῖνα νήχεσθαι διδάσκεις: ἐπὶ τῶν ἐν ἐκείνοις τινὰ παιδοτριβούντων, ἐν οἷς ἤσκηται → Teaching dolphins to swim: is applied to those who are teaching something among people who are already well versed in it
Greek (Liddell-Scott)
αἰγοκερεύς: έως, Ἰων. ῆος, ὁ, = τῷ ἑπομ. Π. Ἄρατ. 386.
