The ability to make any undertaking extremely profitable. According to legend, Midas, King of Phrygia, asked the gods that everything he touched would turn into gold. Dionysus granted his request, but when the very food Midas wished to eat turned to gold, he asked the gods to take back their gift. Dionysus then ordered Midas to bathe in the River Pactolus, thereby washing away the gift. By the seventeenth century the idea was applied figuratively to any person with a gift for making money. See also rich as Croesus.

Close-fitting and taut. The analogy is to the skin of the drumhead, which is tightly stretched so that when it is struck the drum sounds as it should. This term was transferred in the nineteenth century to anything stretched taut; Thomas Hughes (Tom Brown’s School Days, 1857) described his hero as having eaten so much that “his little skin is as tight as a drum.” In succeeding years, however, the analogy itself was sometimes to a drum-shaped container for liquids, such as an oil drum, which of course must be well sealed to prevent leakage. Hence the expression “tight as a drum” also became synonymous with “watertight,” as in “The shelter they rigged up was as tight as a drum.”