γλοιάς
From LSJ
Τούτῳ τῷ λόγῳ χρήσαιτο ἄν τις ἐπ' ἐκείνων τῶν ἀνθρώπων οἳ παραδόξως ἀλαζονεύονται, μηδὲ τὰ κοινὰ τοῖς ἀνθρώποις ἐπιτελεῖν δυνάμενοι → One would use this fable for those who give themselves unreasonable airs, but can't handle everyday life (Aesop 40)
English (LSJ)
άδος, ἡ,
A vicious, of mares, S.Fr.1037:—masc. γλοίης, ητος, of horses, Hdn. Gr.2.680; also of persons, slippery, shifty, EM 234.44.
Greek (Liddell-Scott)
γλοιάς: -άδος, ἡ, κακοήθης, ἀσελγής, ἐπὶ φορβάδων, Σοφ. Ἀποσπ. 863· οὕτω τὸ ἀρσ. γλοίης, ητος, ἐπὶ ἵππων, Ἡρῳδιαν. ἐν Φιλολ. Μουσ. 5. σ. 246, Ἡσύχ., Ἐτυμ. Μ.