Noun
cast-iron stomach (plural cast-iron stomachs)
- (gastroenterology, figuratively) A capacity to consume without difficulty quantities of alcohol, spicy food, spoiled food, or other food and drink that would normally cause indigestion.
1863, Dio Lewis, Weak Lungs and how to Make Them Strong, page 75:An animal man, with a cast-iron stomach, or, perhaps quite as often a dyspeptic, with a suffering stomach and ruined health, will say, “don’t keep thinking about your food; it will give you the dyspepsia.
1989 January, Texas Monthly, volume 17, number 1, page 125:I love to travel and to shop, and I've got a cast-iron stomach, so I gain about ten pounds every trip.
2009, Norman Barasch, The Joy of Laughter: My Life as a Comedy Writer, page 104:Carroll, with his normally cast-iron stomach, began to complain of stomach pains.
2011, Helen Evans, Reluctant Heroes, page 19:He must have a cast iron stomach too. He volunteered to finish off any spare sandwiches or apple cores or even orange peel, if there were any, going begging.