Class

adj.

Heard in Tipperary, Galway, Limerick, Donegal, Longford, Cork, Kildare and Kilkenny

Something that is brilliant or someone that is very good at something.

In use

Tom: "Did ya watch the United game yesterday?" John: "Ya, Rooney was class'"

Posh English

Did you happen to view the United fixture yesterday afternoon?

Same phrase, other counties