in over 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!
*in over one's head(with someone or something)
1. Lit. in water that is deeper than one is tall. (*Typically: be ~; get ~.) Johnny! Don't go out too far! You are in over your head.
2. Fig. too deeply involved with someone or something, beyond what one can deal with. (*Typically: be ~; get ~.) They are all in over their heads with this money business.
3. Fig. having more difficulties than one can manage. Calculus is very hard for me. I'm in over my head.