A "visceral reaction" refers to a strong and instinctive emotional response that comes from deep within us, often without thinking or reasoning. It is a deep, intense feeling that can arise immediately and involuntarily. Full definition
I knew I would have to contend not only with the normal, rather striking visceral reactions of being so high up, but also with the added complications from my brain damage. (discovermagazine.com)
A major theme of the conference was the role of emotion of visceral reactions in the decision making process of learners. (elearningindustry.com)
But as long as trolls can provoke visceral reactions with over-the-top statements, internet religious discussions turn into flame wars while the trolls laugh. (religion.blogs.cnn.com)