The phrase "hath butterflies" means to be nervous, anxious, or have a feeling of trepidation about something. Antonyms for this phrase would be to have courage, be confident, feel calm, composed, self-assured, or fearless. These words denote a sense of assurance and lack of fear, anxiety, and nervousness that is the opposite of what one feels when they have butterflies in their stomach. Being confident and fearless is essential when facing challenges, making decisions, or working towards a goal because it helps one stay focused and perform at their best. Therefore, replacing the feeling of having butterflies with confidence is crucial for personal development and success.