ἀθυρογλωττία
From LSJ
οὕτως ἐξ ἐχθρῶν αὐτοκτόνα πέμπετο δῶρα, ἐν χάριτος προφάσει μοῖραν ἔχοντα μόρου → thus mutual gifts that bring death were bestowed by enemies, gifts that brought the lot of death in the name of a favor
English (LSJ)
ἡ,
A impudent loquacity, Plb.8.10.1.
Greek (Liddell-Scott)
ἀθυρογλωττία: ἡ, ἀναιδὴς φλυαρία, Πολύβ. 8. 12. 1.
Russian (Dvoretsky)
ἀθῠρογλωττία: ἡ невоздержность на язык (πικρία καὶ ἀ. Polyb.).