Green’s Dictionary of Slang

slang n.2

[Ger. Schlange, a chain, watch-chain or Du. slang, a snake]

1. any form of chains or fetters used to secure a prisoner; usu. in pl.; the noose.

[Ire] ‘De Kilmainham Minit’ in Luke Caffrey’s Gost 7: But yey, if de Slang you run sly, / De Trotler may still be outwitted, / And I scout again on de Lay.
[US]H. Tufts Autobiog. (1930) 292: Slangs signifies irons or handcuffs.
[UK]Vaux Vocab. of the Flash Lang. in McLachlan (1964) 265: slangs fetters, or chains of any kind used about prisoners; body-slangs are body-irons used on some occasions.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[Aus]Bell’s Life in Sydney 26 Feb. 1/4: I napped Thrums in Slangs.
[UK] ‘Six Years in the Prisons of England’ in Temple Bar Mag. Mar. 534: His punishment was [...] six months in chokey with the black dress and slangs.
[UK]Five Years’ Penal Servitude 294: A man who [...] I think, had worn the black dress and ‘slangs’ as the fetters are called.
[UK]A. Griffiths Fast and Loose III 212: If I am caught, it’ll mean a ‘bashing’ and the ‘slangs’.
[UK]Manchester Eve. News 4 Aug. 5/4: Slangs....Chains.
[Can] ‘Thieves’ Sl.’ Toronto Star 19 Jan. 2/5: CHAIN Slang.

2. a watch-chain.

[UK]Vaux Vocab. of the Flash Lang. in McLachlan (1964) 265: slang A watch chain, a chain.
[US] ‘Hundred Stretches Hence’ in Matsell Vocabulum 124: The thimbles, slangs, and danglers filched, / A hundred stretches hence?
[UK]A. Stephens ‘The Chickaleary Cove’ [lyrics] How to do a cross-fam, for a super, or a slang, / And to bustle them grand’armes I’d give the office.
[US]Nat. Police Gaz. (NY) 26 Oct. n.p.: He found his gold ‘super’ gone and his ‘slag’ [sic] with it.
[UK]J.W. Horsley Jottings from Jail 23: ‘Fullied for a Clock and Sl.,’ reveals the fact that the writer stole a watch and chain, was apprehended [and committed for trial].
[UK]M. Davitt Leaves from a Prison Diary I 152: I was jogging down a blooming slum in the Chapel when I butted a reeler who was sporting a red slang.
[UK]A. Morrison Child of the Jago (1982) 153: Both were gold, and heavy: a red clock and slang if ever there was one.
[Aus]Sun. Times (Perth) 16 July 4/7: We never wore a flogger coat, / A ‘thimble’ nor a ‘slang’.
[US]O. Kildare My Old Bailiwick 269: He knew I was crooked, but he couldn’t button his coat so’s that cross wouldn’t show his watch slang.
[Aus]Truth (Brisbane) 22 Jan. 6/4: A good suit of clothes, a hard face, a gold ‘slang’ (watch-chain), or a good Brummagem one [...] are the most conspicuous indica tions of a tip-slinging tout .
[UK]E. Pugh City Of The World 274: He’s got to know whether his toy and tackle is a real clock and slang or only a measly Brummagem fake.
[Aus]Truth (Brisbane) 20 Mar. 16/5: Among his other assets was a gold watchchain that might have been used to tie up a mastiff [...] It seemed as if the hoodoo attaching, to the ‘slang’ was making a race of It.
[US]J. Callahan Man’s Grim Justice 133: I want him to see the rock in my tie [...] and my slang an’ super.
[UK]J. Curtis You’re in the Racket, Too 119: Blimey, a kettle and slang like that’s worth a tidy bit.
[UK]V. Davis Phenomena in Crime 254: Kettle and slang. Watch and chain.
[US]Monteleone Criminal Sl. (rev. edn).

3. (US Und.) a necklace.

J.E. O’Donnell ‘Overcoat Bennie’ in Mss. from the Federal Writers’ Project [Internet] It begins with St. Louis Jimmy’s arrival in the city with a $25,000 necklace which consisted of twenty seven emeralds and twenty six marquise diamonds set in platinum. James had stolen the ‘slang’ from a bedroom wall safe of a New York banker’s home.

4. (S.Afr. gay) the penis.

[SA]K. Cage Gayle 95/1: slang n. (Afr.) (lit. = snake) penis. […] [Western Cape].
[SA]A. Lovejoy Acid Alex 187: And they fucking swore. Creatively. You were Piel, Slang, Spinnekop, Troep, Penie, Perd.

In compounds

slang-dipper (n.)

one who gilds ordinary metal chains and attempts to pass them off as ‘gold’; thus slang-dropper, the person who actually does the ‘trade’, usu. by dropping a chain in the street, picking it up as the victim is passing, then asking them to suggest how much it might be worth; they then get the dupe to buy it, assuring them that they themselves are losing by the deal.

[Aus]Sunshine Advocate (Vic.) 11 Sept. 6/3: Those who gild metal chains to sell them as gold are ‘slang dippers,’ while those who dispose of them are ‘slang droppers’.
slangpark (n.)

(S.Afr. gay) a public lavatory used for soliciting, a ‘cottage’.

[SA]K. Cage Gayle 95/1: slang n. (Afr.) (lit. = snake) penis. slangpark n. (Afr.) (lit. = snake park) public lavatories where men go for anonymous sex [Western Cape].

In phrases

double-slangs (n.)

double irons; thus double-slanged, fettered on both legs.

[UK]H.T. Potter New Dict. Cant (1795) n.p.: slanged double both legs iron’d.
[UK]G. Andrewes Dict. Sl. and Cant.
[UK]Vaux Vocab. of the Flash Lang. in McLachlan (1964) 236: double-slangs double-irons.
[UK]Northampton Mercury 24 Jan. 4/1: ‘There are two more — rogues [...] that ought to be double-slanged here [i.e. in prison]’.
[UK]Duncombe New and Improved Flash Dict. n.p.: Slanged, double ironed on both legs.