Green’s Dictionary of Slang

a girl or young woman.

1857		‘Ducange Anglicus’ Vulgar Tongue.
1859		Hotten Dict. of Modern Sl. etc.
1864, 1867, 1870		Hotten Sl. Dict.
1873		Sl. Dict.
1890–1904		Farmer & Henley Sl. and Its Analogues.
1895		Crowe Aus. Sl. Dict. 10: Bob-my-Pal, my girl.