Muppet

n.

Heard in Kilkenny, Sligo, Galway, Limerick, Dublin, Waterford and Down

A well meaning fool or clumsy person.

In use

Go away ya muppet, spillin' tay all over de good sofa!

Posh English

Depart from my presence you bumbling fellow, spilling tea all over the fine settee.

Same phrase, other counties