macrocranialism
When your head is so big it looks like it was hit by a truck. And sometimes your brain is so small it’s like it’s hiding from the world.
His head is so big, he doesn’t need a backpack. He just wears his books on his head like a crown.
She has a head like a melon. And she still doesn’t know how to spell ‘melon’.
He’s got a head like a mountain. And he still doesn’t know how to ride a bike.