cad cad /ˈkæd/

noun

1. [Archaic] Someone who is morally reprehensible  ( blackguard , bounder [Archaic, British] , cad [Archaic] , dog [Informal] , heel [Informal] , hound )
   someone who is morally reprehensible
    You dirty dog
   you dirty dog
   

 CAD

1. Software used in art and architecture and engineering and manufacturing to assist in precision drawing  ( CAD , computer-aided design )
   software used in art and architecture and engineering and manufacturing to assist in precision drawing