Boss-in-law
When someone works for the significant other of a friend.
Bill - Hey, I hear your boss is my new girlfriend.
Gabe - Yah, I guess so.
Bill - So, I guess that makes me your boss-in-law.
Gabe - Yah, I guess so.
Bill - So, I guess that makes me your boss-in-law.
Boss in-law
The Boss of your spouse / partner.
Going to my wife's work do, but can't get too drunk as my boss in-law will be there.
Boss-in-law
Your boss' boss.
My boss-in-law called me to get office to see if I would be get inside spy on my boss.