1. a thieving prostitute.
|Life’s Painter 154: Touching Sue. A noted prostitute in the neighbourhood of St. Giles’s [...] will rob you of something; if she takes a man to her lodging she is noted for twang stealing.|
2. a pimp or a prostitute’s male accomplice, who arrives to beat up victims whom she has robbed, under the guise of offering them intercourse.
|Conduct of Receivers and Thief-Takers 6: He was a Twang, alias followed the Tail of his Wife, a common Night Walker.|
|(con. 1710–25) Tyburn Chronicle II in (1999) xxviii: A Twang A Bully.|
(Irish) a pimp.
|[Michael Moran] ‘The Twang Man’ [lyrics] Come listen to my story, ’tis about a nice young man / When the Militia wasn’t wantin’ he dealt in hawkin’ twang / He loved a lovely maiden as fair as any midge / An’ she kep’ a traycle depot wan side of the Carlisle bridge / Another man came a courtin’ her, and his name was Mickey Baggs / He was a commercial traveller an’ he dealt in bones and rags / Well he took her out to Sandymount for to see the waters rowl / An’ he stole the heart of the Twangman’s girl playin’ ‘Billy-in-the-bowl!’.|
|O’Byrne Files – Dublin Sl. Dict. [Internet] Twangman n. Pimp.|
SE in slang uses
see under wire n.1