Gaeligger
A Gaeligger is like an Irish person who acts like they’re better than you, even when you’re clearly better.
He’s a Gaeligger and he thinks he’s better than me even though I beat him in the race.
She called me a Gaeligger because I did better than her in the science fair.
My neighbor is a Gaeligger and he still thinks he’s the best even though I beat him in chess.