Green’s Dictionary of Slang

Auntie Jane n.

[aunt n. (4) + proper name]

(Irish) menstruation, a period.

[Ire](con. 1970) G. Moxley Danti-Dan in McGuinness Dazzling Dark (1996) I iv: I told you Noel, I’m due my Auntie Jane. My friend, do you get me?