cast-iron stomach

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cast-iron stomach

The ability to eat foods that others may find unusual, unpalatable, or too spicy, without experiencing any ill effects like nausea or upset stomach. My husband has such a cast-iron stomach that he can eat a ghost pepper and feel perfectly fine afterward. You must have a cast-iron stomach if you're eating pickles with peanut butter!
See also: stomach
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

cast-iron stomach

Fig. a very strong stomach that can withstand bad food or anything nauseating. If I didn't have a cast-iron stomach, I couldn't eat this stuff. Fredknown for his cast-iron stomach—ate ten whole hot peppers.
See also: stomach
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
I suppose I have a cast iron stomach and I am immune to all known germs.
But if you have a cast iron stomach then this show might just be for you.
On the downside, if you were with the Coastguard, you may well find themselves venturing forth into the briny in all manner of conditions, so you'll certainly need a cast iron stomach.
Can't be anything he has to eat, he's a labrador for goodness sake, a breed famous for having cast iron stomachs and Basil is no exception.