dog in the manger 是来自哪则《伊索寓言》

a dog in the manger 占着茅坑不拉屎的人
出自《伊索寓言》(Aesop's Fables),有一篇狗站马槽的故事,说的是一头狗躺在堆满稻草的马槽里,狗是不吃草的动物,而当马或牛一走进稻草时,这头狗却朝着马,牛狂哮,不准食草动物享用.
因此,“狗站马槽”就成了一个家喻户晓的成语而进入英语中,常用来比喻a person who prevents others from enjoying sth that is useless to himself; a churlish fellow who will neither use a thing himself nor let others use it,讽刺那些占据说职位或某些物质却不做事的人.