jackeen
A not-so-nice way to call someone from Dublin, and if you're from Cork, you probably know why you hate them so much.
That jackeen thinks he’s the best just because he’s from Dublin and I’m not.
My brother called me a jackeen because I didn’t like the way he talks.
That jackeen came to Cork and tried to act like he knew everything, but he didn’t even know what a proper breakfast was.