The phrase "having a funny feeling" typically refers to a sense of unease or suspicion about something. Antonyms for this phrase would be words or phrases that describe feelings of confidence or certainty. For example, synonyms for "having a funny feeling" might include feeling anxious, uneasy, or apprehensive. Antonyms, on the other hand, might include feeling reassured, confident, or certain. Other antonyms could include feeling optimistic, positive, or hopeful. By using these antonyms, speakers or writers can communicate a range of different emotional states and attitudes towards a particular situation or event.