неугомонный болтун

From LSJ

τὸν ἀπὸ γραμμᾶς κινεῖν λίθον → move one's man from this line, move a piece from this line, try one's last chance, make a last ditch effort

Source

Russian > Greek

μακροφλυαρήτης, κρότημα, κρόταλον