in over your head

in over (one's) head

Too deeply involved in or with a difficult situation, beyond the point of being able to control or cope any longer. I think I'm in over my head with Amy. She wants marriage, kids, and a house, and I'm just not ready for any of that. I've gotten in way over my head with this money laundering scheme—now the mob is threatening my family if I try to back out!
See also: head, over
Farlex Dictionary of Idioms.

in over your head

If you are in over your head, you are in a situation that is too difficult for you to deal with. He realized that he was in over his head, and that only his family could help him. Note: You can also say that someone gets in over their head if they get into a situation that is too difficult for them. Kelly told the hearing he got in way over his head and became afraid after the prisoner threatened him and his family. Note: Here, the reference is to getting into water that is too deep to stand up in.
See also: head, over
Collins COBUILD Idioms Dictionary, 3rd ed.

in over your ˈhead

involved in something that is too difficult for you to deal with: After a week in the new job, I soon realized that I was in over my head.
See also: head, over
Farlex Partner Idioms Dictionary
See also:
  • in over (one's) head
  • in over head
  • in over one's head
  • be in over (one's) head
  • get in over (one's) head
  • if you can't take the heat, get out of the kitchen
  • If you can’t stand the heat, keep out of the kitchen
  • if you can't stand the heat
  • if you can't stand the heat, get out of the kitchen
  • if you can't stand the heat, keep out of the kitchen