源出《伊索寓言》： 一只狗自己不吃马槽里的干草，却又向马吼叫而不让马吃草。

例： Smith was a dog in the manger over that roll of wire; it was no use whatever to him, but he wouldn't let me have it. 史密斯是个占着茅坑不拉屎的家伙，那卷金属线对他根本没用，但他又不让我用。