Green’s Dictionary of Slang

1. the vagina.

1890–1904		Farmer & Henley Sl. and Its Analogues.
1896		Farmer Vocabula Amatoria (1966) 20: Atre, m. The female pudendum; ‘home-sweet-home’.

2. (N.Z. prison) a prison, for one who has become institutionalized.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 89/1: n. prison.