一只脚跨进阴间

一只脚跨进阴间:

Literally means:

have a foot in the grave already

Actually means:

阴间, the Hades, refers to the place where superstitious people think that the dead are heading to.

This phrase means that time left for someone is not much, or he is going to die. When used to refer to oneself, it has sad implication. It is slightly derogative in meaning.

阴间，迷信的说法，指人死后要去的地方。

一只脚跨进阴间，指某人活着的时间不多了，或将要死了。指自己时有时含有忧伤的意味。略含贬义。