不中用

不中用:

Literally means:

unfit for anything; good for nothing

Actually means:

It refers to something worthless, or a human organ; that does not function properly and becomes useless.

It means that someone has no capacity and does a poor job. It can also refer to someone who is dying. Derogatory.

指东西不合用,不起作用,或人体器官的功能有毛病不起作用。

指人没有能耐,做不好事情。也指人快死了。具有贬义色彩。