Galomff
A fool or a brat who won’t stop being silly and won’t listen to reason even when it’s right in front of their face.
My sister is a Galomff. She thinks she can beat me at video games even though she’s never won.
My cat is a Galomff. It won’t stop knocking things off the table.
My brother is a Galomff. He still thinks he’s the king of the school.