What is a rotten peach blossom? What is "peach blossom robbery"?

For those who are married or have a fixed couple, it is "peach blossom robbery", and for those who have no couple, it is "peach blossom luck".

Rotten peach blossom is a fashionable term, that is, lucky peach blossom, but the other party's conditions are not satisfactory, but they chase you and make you hate it.

In other words, rotten peach-that is, he/she is not your cup of tea.