κεραυνὸν ἐν γλώττῃ φέρειν → carry a thunderbolt on his tongue
boaster: Ar. and P. ἀλαζών, ὁ or ἡ, V. κομπός, ὁ (Euripides, Phoenissae 600).
demagogue, adj.: P. δημηγόρος, ὁ, δημαγωγός, ὁ.
be a ranter (on the stage), v.: P. τραγῳδεῖν.
