have no stomach for something
not have the stomach for (something)
1. To lack the courage, determination, or resolve to do, face, or experience something unpleasant. Can also be phrased as "have no stomach for something." The military always sounded interesting as a means of traveling the world, but I know I would not have the stomach for combat. I have no stomach for scary movies, but my girlfriend loves them.
2. To be unable to tolerate a certain food. I love living in India, but not having the stomach for spicy food makes mealtimes here rather difficult. I just don't have the stomach for rich, fatty foods like I did when I was younger.