have no stomach for (something)
1. To lack the courage, determination, or resolve to do, face, or experience something unpleasant. Can also be phrased as "not have the stomach for something." The military always sounded interesting as a means of traveling the world, but I know I'd have no stomach for combat. I have no stomach for scary movies, but my girlfriend loves them.
2. To be unable to tolerate certain food(s). I love living in India, but having no stomach for spicy food makes every meal here rather difficult.