Green’s Dictionary of Slang

(UK tramp) a woman.

1839		H. Brandon Dict. of the Flash or Cant Lang. 164/1: Lunan – a girl.
1847		G.W.M. Reynolds Mysteries of London III 85/1: Lunan. To smash a single finnip .
1859		Matsell Vocabulum.
1860		Hotten Dict. of Modern Sl. etc.
1871–82		B.M. Carew Life and Adventures.
1882		Sydney Sl. Dict. (2 edn) 6: Lunan - A girl.
1890–1904		Farmer & Henley Sl. and Its Analogues.
1895		C. Crowe Aus. Sl. Dict. [as 1882].