Chichivache

[chich-uh-vahsh] /ˈtʃɪtʃ əˌvɑʃ/
noun
1.
(in early English literature) a mythical animal, usually depicted as a cow verging on starvation, that existed solely by devouring virtuous women.
Compare Bicorn.
Origin
1350-1400; Middle English < Middle French (north) chichefache thin face, ugly face, monster (hence vache cow, by folk etymology, replacing fache)