αὐτοσχεδιαστής
From LSJ
Ἐφόδιον εἰς τὸ γῆρας αἰεὶ κατατίθου → Bonum senectae compara viaticum → Wegzehrung für das Alter sorge stets dir vor
English (LSJ)
οῦ, ὁ,
A one who acts or speaks offhand: and so, raw hand, bungler, opp. τεχνίτης, X.Lac.13.5.