Définition et Signification de "save one's skin / neck "

What is the origin of the idiom "save one's skin" and when to use it?

The idiom "save one's skin" has origins in the idea of preserving one's physical well-being or avoiding harm. It is a figurative expression used to describe actions taken to ensure one's safety or protect oneself from danger, often at the expense of others or in challenging situations.