Fierce
Heard in Offaly, Kerry, Leitrim, Cork, Kilkenny, Donegal, Cavan, Mayo, Roscommon, Galway, Meath, Waterford and Kildare
Very or extremely.
I had a skinful last night and now I have a fierce bad hangover.
I consumed a considerable quantity of alcohol last night and now I have an extremely unpleasant hangover.