Green’s Dictionary of Slang

rattling-gloak n.¹

also rattling-gloke

(UK Und.) a coachman.

1753		J. Poulter Discoveries (1774) 42: Mill the rattling Gloke; kill the Coachman.
1786		Whole Art of Thieving [as cit. 1753].
1799		‘Cant Lang. of Thieves’ Monthly Mag. 7 Jan. [as cit. 1753].