There is very little agreement amongst scholars, practitioners, and others in a definition of terrorism. The “sole practitioner” concept is equally elusive, with terms ranging from lone wolf to lone actor to lone operator. The concept of cyberterrorism appears to be so controversial that the very existence of this threat is disputed. This paper defines the concept of the lone operator cyberterrorist, a topic that is nearly absent in the literature. This paper will present a working definition of these terms with which to start the conversation, and compare and contrast the motivation and characteristics of the lone operator terrorist and lone operator cyberterrorist.