dog’s ear—a corner of a page turned down to serve as a book-mark:
- The book was well-thumbed, with dog’s ears and little slips of paper in it.
pig’s ear—(coll., in the phrase “make a pig’s ear of something”) make a mess of smth.; do a task badly:
- “I’ve made a real pig’s ear of it, haven’t I?” said Basil, with an attempt at lightness.