The phrase "felt gut" refers to strong intuition or a deep inner feeling. The antonyms for this phrase would include doubt, uncertainty, and skepticism. Doubt represents a lack of confidence or belief in something, while uncertainty refers to a state of unsureness or indecisiveness. Similarly, skepticism is the opposite of intuition, as it implies a critical and skeptical attitude towards any feeling or belief that lacks supporting evidence or reasoning. In short, while "felt gut" implies a strong and unwavering feeling, its antonyms suggest hesitation, skepticism, and a lack of trust in one's instincts.