Green’s Dictionary of Slang

caze n.

[? misreading of Ital. cazzo, the penis]

the female genitals.

J. Payne Book of the Thousand Nights etc. n.p.: ‘The Porter of the Three Ladies of Baghdad.’ Thy caze, thy tout, thy catso, thy coney [F&H].
[UK]Farmer & Henley Sl. and Its Analogues.