Определение и Значение "[give|care] a hang"

What is the origin of the idiom "not give a hang" and when to use it?

The expression "not give a hang" likely originated from the broader usage of "hang" as a term for a minor or insignificant amount, which was commonly used in informal language. In this context, "hang" represents a very small, unimportant quantity. Over time, this expression became an informal way to emphasize the lack of concern or interest in something.