Green’s Dictionary of Slang

smacking-cove n.

[SE smack, i.e. his whipping of the horses + cove n. (1)]

a coachman.

[Ire]Head Canting Academy (2nd edn) n.p.: Smacking-cove A Coach-man.
[UK]B.E. Dict. Canting Crew [as cit. 1674].
[UK]J. Shirley Triumph of Wit.
[UK]New Canting Dict. [as cit. 1674].
[UK]Bailey Universal Etym. Eng. Dict. [as cit. 1674].
[UK]Canting Academy, or the Pedlar’s-French Dict. 114: Coachman A smoaking [sic] Cove.
[UK]Scoundrel’s Dict. 16: A Coachman – Smacking-cove.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]E. de la Bédollière Londres et les Anglais 318/1: smacking cove, un cocher.
[Aus]Crowe Aus. Sl. Dict. 76: Smacking Cove, a coachman.