Savage

n.

Heard in Cork, Kilkenny, Meath, Dublin, Leitrim, Mayo, Carlow, Longford, Waterford, Galway, Tipperary and Wexford

Excellent, impressive, or highly enjoyable.

In use

That feed we had was absolutely savage, I tell ya.

Posh English

That repast was truly magnificent, I assure you.

Same phrase, other counties