above/over somebody's head
*over someone's head
1. Fig. [of the intellectual content of something] too difficult for someone to understand. (*Typically: be ~; go ~; pass ~.) All that talk about computers went over my head. I hope my lecture didn't go over the students'heads.
2. and *over someone; *above someone Fig. to an authority higher than someone. (*Typically: be ~; go ~.) I don't want to have to go over your head, but I will if necessary. I had to go over Fran to get it done. My boss wouldn't listen to my complaint, so I went above her.