Green’s Dictionary of Slang

cardinal n.1

[ref. to a cardinal’s cloak, which is red]

1. a lady’s cloak.

Connoisseur No. 62 n.p.: That fashionable cloak... which indeed is with great propriety styled the cardinal [F&H].
[UK]Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Cardinal. A cloak in fashion about the year 1760.
[UK]Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn) n.p.:
[Aus]Vaux Vocab. of the Flash Lang.
[Ire]Cork Examiner 8 June 3/4: The Newesrt Designs for June in Cardinal Capes, Paisley Shawls.
[UK]Wilts. Indep. 9 Oct. 2/2: [advert] Charles Roach Announces his Return from London with an entire new and fashionable Stock [...] Muffs, Boas, Victorines, Cardinals, etc.
[US]Bartlett Dict. Americanisms.
[UK]Hotten Dict. of Modern Sl. etc.
[UK]Hotten Sl. Dict.
Besant & Rice Chap. of the Fleet Pt I Ch. 4: In the windows of which were hoods, cardinals, sashes, pinners, and shawls [F&H].

2. mulled red wine.

[UK]T. Hughes Tom Brown at Oxford (1880) 171: He goes up, and finds [...] tankards full of egg-flip and cardinal.
[UK]Sl. Dict.

In phrases

the cardinal is at home (also the cardinal is come)

a euph. phr. used to indicate that a woman is menstruating.

[UK]Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: The Cardinal is come; see The Captain, &c [i.e. ‘The Captain is come The catamenia are come down’].
[UK]Grose Classical Dict. of the Vulgar Tongue (2nd edn, 3rd edn) .
[US]Maledicta IV:2 (Winter) 197: Or she may permit a bit of bazooka (= all but), refraining from sexual intercourse because the flag is up, indicating that the [...] cardinal is home.