Proper terminology is important for anyone who wants to learn something. The best way to develop professionalism is to rely on a set of well defined technical terms. So it should be in any professionals interest to avoid vague terms which tend to produce misleading associations. The two most common you will probably encounter are cyber and hacking. I still struggle to see any correlation with information security and would like to know how these terms even became that prevalent.
Cyber refers to cybernetics, which - surprisingly - has nothing to do with information security at all. The term itself stems from kubernetes which means steersman in Greek. Even the computer science related associations of this term rather refer to the control of devices and the analysis of information like cellular automaton, decision support system, design patterns, robotics or simulation. There has been a new definition which is almost as vague, namely "something that has to do with the Internet". Apart from computer crime not necessarily having something to do with the Internet, this definition applies to almost anything nowadays! So I don't see any reason to use terms like cyber security, cyber warfare or cyber attacks.
Hacking is another overused buzzword. Problem here is the very vague definition which most of you know. As far as I know the term has - at least in the US - a much stronger connection to programming than to information security. In Europe, the term is mostly negatively associated with computer criminals. Among the IT affine people it is also mostly connected to the maker culture. In any case the loose distinction makes hacking an inadequate term to refer to information security and pentesting in particular.
This may be just my view on the things so I'd like to know why and when these terms showed up and why they are still used.