in over head

*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.
See also: head

in over your head

involved in a situation that is too difficult for you to deal with Historians say that as president, Harding was a man who was in over his head.
See also: head