Puss

n.

Heard in Mayo, Kilkenny, Cork, Offaly, Waterford and Roscommon

A sullen, miserable expression or pout on someone's face.

In use

Would you look at the puss on her because she didn't get her way!

Posh English

Would you observe the disgruntled scowl upon her countenance because her demands were unmet!

Same phrase, other counties