variants  
 also muck-a-mucks  
 or mucky-mucks
        
    as in heavyweights
                                      
              
          
                                                      one of high position or importance within a group                                       
              
                             the obituary mentioned that he was a muckety-muck in several service clubs                         
                
                                                                                                                                                                                                                    
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  Merriam-Webster unabridged




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