you (or he etc.) will be lucky (or should be so lucky)
Used to imply in an ironic or resigned way that someone’s wishes or expectations are unlikely to be fulfilled: ‘A shirt would be nice.’ ‘You’ll be lucky.’...- I wasn't made for Kylie - she should be so lucky.
- In view of the current weakness in corporation tax receipts - he should be so lucky.
- How I envy your ability to get over things and move on. I should be so lucky.
See parent entry: lucky