Fierce

adj.

Heard in Roscommon, Cork, Kilkenny, Donegal, Cavan, Mayo, Offaly, Galway, Meath, Waterford and Kildare

Very, for example to describe a sizeable quantity of turf one might say:

In use

Das a fierce pile of bog!

Posh English

That is a substantial quantity of peat.

Same phrase, other counties