negligent entrustment
noun
                                                                                                                            
                                                            negligent en·trust·ment
                    
                                                                                                              
                                                                                                                              
            -in-ˈtrəst-mənt
                                                      
                                                          
                                
              
          
                                                      : the entrusting of a dangerous article (as a motor vehicle) to one who is reckless or too inexperienced or incompetent to use it safely                                      
                
                                
            also                
          
                                                      : a theory or doctrine making one liable for injury caused by a party to whom one negligently entrusted something                                      
            
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  Merriam-Webster unabridged




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