jabronny
A jabronny is a chin so big, it could make a mountain jealous. It’s like the person has a chin on top of a chin, and it’s just begging for a compliment.
His jabronny is so big, it could probably live on its own.
That jabronny is so huge, it could be used as a shield.
Her jabronny is so big, it’s like it’s got its own gravity.