"Beating the copper", in nautical terminology, refers to the continuous work of beating the copper plates that the ships carried to cover the dead work of the same, adapting to their forms, both in pantouch, elbow and in the lining, used mainly in the ships during the seventeenth centuries and later until the steel ships began, Copper lining that avoided major damage in combat, avoiding waterways, in addition to avoiding the joke that deteriorates the lining strips. Due to the hard of this work, when you have to perform an important or heavy work, this work, it is said, that it is time to "beat the copper".