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Phrase(s): *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.
McGrawhill's American Idioms And Phrasal Verbs