Savage

n.

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

Someone with a very large appetite who usually displays poor table manners.

In use

You got 4 big macs, jaysus your some savage

Posh English

You have secured four large hamburgers. Good heavens, you possess a monstrous appetite.

Same phrase, other counties