Green’s Dictionary of Slang

cut-throat n.

1. a dark lantern.

Public Advertiser 1 Dec. 2/1: It was what the neighbourhood of St Giles’s called Cut-throat Lanterns, which keep the Bearers in the Shade when the Beam is turned, with all its Strength, on the destined Prey.
[UK]Partridge DSUE (1984) 283/2: ca. 1770–1840.

2. a butcher, a slaughterer.

[UK]‘Ducange Anglicus’ Vulgar Tongue.
[UK]Hotten Dict. of Modern Sl. etc.
[UK]Hotten Sl. Dict.
[UK]Sl. Dict.
[Aus]Crowe Aus. Sl. Dict. 22: Cut Throat, a butcher.

3. (US black) a tough, aggressive or frightening black man.

[UK]Hotten Dict. of Modern Sl. etc.
[UK]Hotten Sl. Dict.
[UK]Sl. Dict.
[US]E. Torres Q&A 117: My first night on post on 111th Street and Madison, I told all the cutthroats there [...] ‘[W]hen I’m on the post, the baddest mother fucker here is me’.
[US]E. Folb Runnin’ Down Some Lines 45: Cutthroat [...] suggest[s] that, like a mad dog, such a person is potentially out of control.

4. (US) a stand-up collar.

G.H. Haydon Aus. Emigrant 178: That confounded swallow-tail and cut-throat collar were sufficient to alloy felicity even greater than mine.
Punch’s pocket-Bk 148: Anon a West-end Swell, in brave attire, / Wide peg-top trousers, many eye-holed boots, / Acut-throat collar, and loose-sleeved coat .
N.Y. Musical Rev. 9 133/2: He’s got a mustash, and a stiff back, and a cut-throat collar.
[US]Perrysburg Jrnl (OH) 6 May 4/1: The narrow standing collar which was at one time fashionable was called ‘cut-throat’.
[UK]C.K. Sharpe Letters 1 525: London, where nobody goes to bed without a patent maul-proof nightcap and anti-cut-throat collar.
H.A. Vachell Life & Sport on Pacific Slope 155: Here the women wear the plainest clothes, while the male gladly lays aside his cut-throat collar and assumes instead the soft and becoming stock.

5. an open-bladed, non-safety razor.

[UK]G. Kersh Night and the City 270: That big nigger’s after you, with a bloody cut-throat as long as me arm.
[UK]Partridge DSUE (8th edn) 283/2: late C.19–20.