Eegit

n.

Heard in Carlow, Offaly, Wexford and Tyrone

A foolish, simple-minded, or utterly clueless person.

In use

Did ya lay eyes on that absolute eegit trying to break-dance on the table last night?

Posh English

Did you observe that consummate fool attempting to break-dance upon the table last evening?

Same phrase, other counties