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1. noun The corner of a page of a book that has been turned down to mark one's place. I always leave a dog-ear in my textbooks to indicate an important page when I'm studying.
2. verb To fold over the corner of a page of a book to mark one's place. I really hate it when people dog-ear their books. It ruins the look of the page!
Having ears that stick out markedly from the side of the head, thus resembling the handles of a jug. I was pretty goofy-looking as a kid, jug-eared, bespectacled, and lanky as I was.