ogre         
noun [ C ] uk/ˈəʊ.ɡər/ us/ˈoʊ.ɡɚ/
 (童话中的)吃人怪物,食人恶魔
a large frightening character in children's stories who eats children
  informal凶残可怕的人,凶恶的人 
a fierce and frightening person
  Some of my teachers were real ogres. 我的一些老师是十足的恶魔。