buttinsky
noun
                                                                                                                            
                                                            butt·in·sky
                    
                                                                                                              
                                                                                                                                  bə-ˈdin-skē 
                                                                                                                              
            bət-ˈin-skē
                                                      
                                                          
            variants  
 or less commonly buttinski
        
    
            
               plural buttinskies            
        
    
                                
              
          
                                                      : a person given to butting in : a troublesome meddler                                      
                
                    
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  Merriam-Webster unabridged




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