Yer wan

exp.

Heard in Wexford, Offaly, Kilkenny, Sligo and Leitrim

That young woman. Also used approvingly of an attractive female.

In use

Sure look at yer one. Jaysus, look at the arse on yer wan!

Posh English

Just look at that young lady. Good heavens, observe the endowments on that young woman.

Same phrase, other counties