What is the origin of the idiom "get one's hands dirty" and when to use it?

The idiom "get one's hands dirty" has its origins in labor and manual work. It implies that a person is willing to engage in a task that involves physical effort, hard work, or even morally challenging activities. It is often used to describe someone who is not afraid to do the hard work necessary to achieve a goal or to take responsibility for something that may be unpleasant or difficult.