Flange

n.

Heard in Carlow, Cork, Sligo and Dublin

[vulgar: female genitalia - NB Cork/Munster may be first claimants of this phrase]

In use

Howya flange vulgar address to familiar female (or girlfriend)

Posh English

How do you do, my dear. One employs the term as a vulgar yet affectionate address to a familiar lady or girlfriend.

Same phrase, other counties