braggart
From LSJ
λόγῳ ἀναλίσκω τὸν χρόνον τῆς ἡμέρας → waste the day in idle talk, consume the duration of the day with talk
Ar. and P. ἀλαζών, P. κομπώδης (Thuc.), V. ὑπέρφρων, ὑψήγορος, στόμαργος, γαῦρος; see boastful.
(Of words), etc.: P. and V. ὑψηλός, P. ὑπέρκοπος.