Green’s Dictionary of Slang

1. a prostitute.

1842		Whip & Satirist of NY & Brooklyn (NY) 21 May n.p.: the whip wants to know Whether Andy has seen the ‘Omnibus’ since last summer [...] Has she given him the sack.
1984		Partridge DSUE (8th edn) 828/2: ca. 1850–1910.

2. the vagina.

1890–1904

Farmer & Henley Sl. and Its Analogues.