Green’s Dictionary of Slang

a euph. for damned adv.

1887		‘A Plain Woman’ Poor Nellie I 194: A confounded bad dinner and hanged bad wine. [Ibid.] 201: Then they are hanged fools!
1908		D. Stewart Wild Tribes of London in Illus. Police News 18 Jan. 12/1: Never stick to one woman. They are all hanged, deceitful cats.
1916		R. Service ‘The Odyssey of ’Erbert ’Iggins’ in Rhymes of a Red Cross Man 48: ’Anged lucky we aren’t booked through.