“Peaches” em Miami Beach, Miami, Estados Unidos

“Peaches” means to be like a fruit, which is to say, sweet, delicious, highly valued and highly desired and even edible.
Also used is the adjective “peachy”. People might say. “That is just peachy!”
If somebody helps me, and I want to thank them and make them feel good, I might say; “Thanks. You are a real peach!”
It is also used in sarcastic way when things go wrong. If your car has a flat tire, you might say sarcastically: “Oh that is just peachy!” This means about the same as “Oh, damn it!”
If I want to refer to a person as simply beautiful, or gifted with great charm in their personality, I would say: “He is just a peach!” or “She is just a peach.”