Flute

n.

Heard in Mayo, Tipperary, Fermanagh, Sligo, Galway, Limerick, Longford, Cork and Dublin

A foolish, annoying, or incompetent person.

In use

He's an awful flute that fella, crashing the tractor into the ditch!

Posh English

He is an exceptionally dense fellow, steering the agricultural tractor directly into the ditch!

Same phrase, other counties