HORSE-SHOES, the game of coits, or quoits--because sometimes actually played with horse-shoes. [John Trotter Brockett, "A Glossary of North Country Words," 1829]
The belief that finding a horseshoe by chance is lucky is attested from late 14c., and the practice of nailing one above a doorway to prevent a witch entering therein was common in London down to c. 1800. Of a type of bend in a river, 1770, American English. As a type of crab, from 1775.horse,马，shoe,鞋。即马蹄铁，在民间传说中为带来好运的吉祥物。