Daw

n.

Heard in Waterford and Wicklow

An idiot or fool.

In use

Dat fella is some daw boy, he ony went an put unleaded in de car. His mudder went mental cos tis a diesel.

Posh English

That fellow is a complete idiot. He only went and put unleaded petrol in the diesel car. His mother went absolutely mental.

Same phrase, other counties