Green’s Dictionary of Slang

Bristol n.

[SE Bristol-board, a type of pasteboard with a smooth surface, popular for printing such cards]

a visiting card.

[UK] (ref. to 1830+) in J. Ware Passing Eng. of the Victorian Era.

Proper name in slang uses

In compounds

Bristol milk (n.) [now a trademark of Harvey’s, the Bristol sherry importers]

sherry, esp. rich, sweet sherry.

Prynne & Walker Colonell Fiennes his Tryall 78: Being furnished with good store of Bristoll milk, strong wines and waters.
[UK]Fuller Worthies (1840) III 115: bristol milk; this metaphorical milk, whereby xeres or sherry Sack is intended.
[UK]J. Ray Proverbs 251: Bristol milk. That is Sherry-sack.
[UK]B.E. Dict. Canting Crew.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]Macaulay Hist. of England I Ch. 3 🌐 A rich beverage made of the best Spanish wine, and celebrated over the whole kingdom as Bristol milk.
Bristol stone (n.) [SE Bristol stone, Bristol diamonds, Bristol gems, a kind of transparent rock-crystal found in the Clifton limestone near Bristol, Avon, resembling the diamond in brilliancy]

sham diamonds.

[UK]B.E. Dict. Canting Crew.
[UK]‘Whipping-Tom’ Democritus III 22: The Jeweller will sometimes put off Bristol Stones for Diamonds.