not worth a hill of beans

Not worth a hill of beans is an idiom which means to have very little or have no value. If someone says something is not worth a hill of beans, this is a somewhat old fashioned way of saying that what you are talking about is not worth very much at all, not even if you had a hill of beans would it be worth it. This something you speak of whether it is an idea, thought or even a person has no value whatsoever.