Gurrier

n.

Heard in Kilkenny, Dublin and Galway

A thug or troublemaker. Also: a feckless or idle young man.

In use

You just a gurrier arent ya" "That fellah's notin but a little gurrier!

Posh English

You are nothing but a troublemaker are you not. That fellow is nothing but a feckless young wastrel.

Same phrase, other counties