COB

noun Etymology: Middle English ~be leader of a group, head; probably akin to cub (young animal), Middle English kebbe old cow or sheep, Dutch dialect kabbe, kebbe piglet Date: 15th century a male swan, 2. a rounded mass, lump, or heap, a mixture of unburnt clay and straw used especially for constructing walls of small houses in England, a crudely struck old Spanish coin of irregular shape, corn~ 1, a stocky short-legged riding horse