Homeromastix
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
Latin > English (Lewis & Short)
Hŏmērŏmastix: īgis, m., = Ὁμηρομάστιξ (Homer's scourge),
I the censurer of Homer.
I Lit., an epithet given to the critic Zoilus, Vitr. 7 praef.—
II Transf., in gen., a censorious person: ut obiter caveam istos Homeromastigas, etc., Plin. H. N. praef. § 28.