Peachy/ˈpiːtʃi/ Definition 1 of 2Pro Tip 1/3Informal Use Use 'peachy' in casual conversations, rather than formal ones. I'm feeling peachy today, thanks for asking! Pro Tip 2/3Positive Nuance 'Peachy' carries a cheerful, slightly playful tone, indicating contentment or satisfaction. The picnic was peachy, we should do it again sometime! Pro Tip 3/3Slight Sarcasm Sometimes, 'peachy' can be used sarcastically to mean the opposite. Stuck in traffic for hours, how peachy!