disparagement
noun
                                                                                                                            
                                                            dis·par·age·ment
                    
                                                                                                              
                                                                                                                                  di-ˈspar-ij-mənt  
                                                      
                                                          
            1
                    
                                          
              
          
                                                      : the publication of false and injurious statements that are derogatory of another's property, business, or product                                      
                
called also business disparagement, commercial disparagement, disparagement of property, slander of goods, trade libel
2
                    
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  Merriam-Webster unabridged




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