An hypothetical beast supposed to devour all men under petticoat government. It is described as very fat and well liking. There was another beast called Chichevache, which fed on obedient wives, but the famished beast was thinner than the most rascal of Pharaoh's lean kine, for its food always fell short. Of course, bi-corn (two-horns) contains an allusion familiar to all readers of our early literature.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894