let the grass grow under one's feet 游手好闲

也作 allow the grass to grow under one's feet  浪费时间

这是一条很生动而形象的成语，一个人让草长在自己的脚下，岂不是说明他懒到家了。一般这条成语用于否定句式中。很多英美作家都使用这条成语。

例1：Ay! They've not let grass grow under their feet in hunting out the man that did it!  欸！ 他们没浪费时间，立刻就把凶手抓到了。（E. Gaskell: Mary Barton Chapter 22)

例2： He was a real attorney. He had not allowed any grass to grow under his feet, you bet. 他才是一个真正的检察官呢！你放心，他正在马不停蹄地使劲干呢。（Th. Dreiser: An Ameircan Tragedy, book III, Chapter 14）