Green’s Dictionary of Slang

rattling adj.

1. fashionable, first-rate.

[UK]R. King New London Spy 44: He abandoned his study for the company [...] of frothy fops and rattling coxcombs [and] devoted the principle part of his time to whoreing, drinking and gaming .
[UK]‘The Trotting Horse’ in Convivialist in Spedding & Watt (eds) Bawdy Songbooks (2011) IV 18: What fun it is to rattle when the sun begins to set, / For to pass the rattling swells, and leave them on the fret.
[UK]R.S. Surtees Young Tom Hall (1926) 72: We must have the drag overhauled [...] and I vote we have the ballet-girl [...] painted out and a rattling Fox with a ‘tallyho’ painted in.
[UK]Music Hall & Theatre Rev. 3 May 6/2: Good old Troc. Always to the front for a rattling company, and plenty of fun if you have an attack of the hump.
[Aus]C. Crowe Aus. Sl. Dict. 65: Rattling, exceeding; jolly, pleasant.
[NZ]Truth (London) 18 June 1678/3: Slang terms: [...] quality, rattling, real-jam, ripping [etc] .
[UK]M. Marples Public School Slang 5: Words expressing general approval [...] rattling: originally an adjective descriptive of speed, but applied more widely from c. 1690.

2. pertaining to a rattler n. (1a)

In compounds

rattling-cove (n.) [cove n. (1)]

(UK Und.) a coachman.

[Ire]Head Canting Academy (2nd edn).
[UK]B.E. Dict. Canting Crew n.p.: Rattling-cove A Coachman.
[UK]A. Smith Lives of Most Notorious Highway-men, etc. (1926) 202: Bilk the Ratling-cove, i.e., to sharp the Coach-man of his hire.
[UK]New Canting Dict. [as cit. c.1698].
[UK]Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
[UK]B.M. Carew Life and Adventures.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]H.T. Potter New Dict. Cant (1795).
[UK]G. Andrewes Dict. Sl. and Cant.
[UK]Lex. Balatronicum.
[UK]‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc.
[UK]G. Kent Modern Flash Dict.
[UK]Flash Dict. in Sinks of London Laid Open.
[US]Matsell Vocabulum.
[Aus]C. Crowe Aus. Sl. Dict. 65: Rattle, a coach; rattling cove, a coachman.
rattling-lay (n.) [lay n.3 (1)]

(UK Und.) stealing goods from a moving coach.

[UK]C. Hitchin Regulator 19: The Ratling-Lay, alias to snatch things out of Coaches as they go along the Streets.
[UK](con. 1710–25) Tyburn Chronicle II in Groom (1999) xxvii: The Rattling Lay Stealing Goods out of Coaches as they pass along the Streets.
rattling mumper (n.) [mumper n. (2)]

(UK Und.) a beggar who specializes in approaching those who ride in coaches.

[Ire]Head Canting Academy (2nd edn).
[UK]B.E. Dict. Canting Crew n.p.: Rattling mumpers c. such Beggers as Ply Coaches.
[UK]J. Shirley Triumph of Wit 195: The Ratling-mumper broke the Ratling peeper [The Coach-beggar has broken the Coach-glass].
[UK]New Canting Dict. n.p.: rattling mumpers the Fifty-Four Order of Villains, such as run after, or ply Coaches, &c.
[UK]Bailey Universal Etym. Eng. Dict. [as cit. 1725].
[UK]Scoundrel’s Dict. 16: Coach-Beggars – Ratling-mumpers.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]H.T. Potter New Dict. Cant (1795).
[UK]G. Andrewes Dict. Sl. and Cant.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]G. Kent Modern Flash Dict.
[UK]Flash Dict. in Sinks of London Laid Open.