A Birkett
A Birkett is a total moron. They're the kind of idiot who thinks they're smart, but they're just at Birkett House, which is a school for brain-dead people.
That guy is a Birkett. He failed math and still thinks he's a genius.
She called me a Birkett in front of my mom. It was embarrassing.
He's the Birkett of the class. Everyone laughs at him.