What does you have a peachy bum mean?

The phrase "you have a peachy bum" is a colloquial expression that typically means someone has a shapely or attractive rear end, likening it to the rounded, smooth appearance of a peach. It is often used in a playful or flirtatious context. While it can be seen as a compliment, it's important to consider the context and the relationship between the people involved, as it can also be perceived as objectifying.