that beats everything idiom slang (US also that beats all)
（表示非常惊讶）真是从来没有的怪事
used to express great surprise
You mean she just left her job without telling anyone she was going? Well, that beats everything! 你是说她刚刚离职却没有告诉任何人她要走了？嗬，这可真是怪事！