Laffonk
A boy who refuses to admit he's been beaten. He'll keep yelling and blaming until you're too tired to fight back. Sometimes he ends up looking like a total fool while you're laughing at him.
You're a Laffonk. I beat you in the math test and you're still arguing like it's the final round of a championship.
Bro, I said you're a Laffonk. You're still trying to save face like a total dork.
You're a Laffonk. I beat you in the video game and now you're screaming like you're in a horror movie.