Dutch gold

noun, Sometimes Offensive.
1.
an alloy of copper and zinc in the form of thin sheets, used as an imitation of gold leaf.
Also called Dutch foil, Dutch leaf, Dutch metal.
Usage note
Dutch gold is not really gold. Because Dutch is used to mean “inauthentic” or “fake,” the term is sometimes perceived as insulting to or by the Dutch. See also Dutch.
British Dictionary definitions for Dutch gold

Dutch gold

noun
1.
another name for Dutch metal

Dutch metal

noun
1.
a substitute for gold leaf, consisting of thin sheets of copper that have been turned yellow by exposure to the fumes of molten zinc