Scientists often say, “bah humbug, this cannot work,” which only means that it cannot work with existing technology.
Republicans had their chance and all they could say was “bah Humbug.”
exclamation of contempt, 1817, perhaps c.1600, probably from French bah, Old French ba, expressing surprise, scorn, dismay. Perhaps simply a natural exclamation in such situations; cf. Greek babai!, an exclamation of surprise.