above (someone's) head

above (someone's) head

Not understood by one because it is too complex or subtle for their comprehension. My jokes always seem to go above Stephanie's head, so I'm glad you think I'm funny at least.
See also: above, head
Farlex Dictionary of Idioms.

above your head

beyond your ability to understand.
See also: above, head
Farlex Partner Idioms Dictionary

above/over somebody’s ˈhead

too difficult for somebody to understand: It was clear from the expression on his face that the lecture went completely over his head.
See also: above, head, over
Farlex Partner Idioms Dictionary
See also:
  • above/over somebody's head
  • over (one's) head
  • over head
  • over one’s head
  • over one's head
  • over somebody's head
  • over your head
  • (something) is over (one's) head
  • slip one past (someone or something)
  • be the butt of the joke