go over someone's head
idiom
                                
              
          
                                                      : to discuss something with a person who is higher in rank than someone else : to bypass a person of immediately higher rank and seek out a person of even higher rank                                      
              
                             
He went over his supervisor's head to complain to the company's president about the policy.
                         
                
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  Merriam-Webster unabridged




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