IDIOMS

over one's head

(business) Directed to someone with authority over the person, so as to avoid requiring the approval of the person himself or herself.

Example: Used other than as an idiom: see over,‎ head.
  This is way over my head. Can you explain it more simply?
  I’m in over my head on this project. Can you help?
  He just shot a spectacularly over his head round of golf and beat all of us.
2005, Robert H. Vaughn, The Professional Trainer: A Comprehensive Guide, page 121:
  [Y]ou suspect that he's building a case to go over your head and talk to your boss about performance in your section.