not worth a hill of beans
Of little or no importance, value, or worth. For all the congressman's posturing about overhauling the tax system, his plan to do so is not worth a hill of beans.
not worth a hill of beans and not amount to a hill of beans; not worth a plugged nickel; not worth beans
Fig. worthless. Your advice isn't worth a hill of beans. This old cow isn't worth a plugged nickel.