But really it's the latest fashionable psychobabble for the sort of personality you attribute to people you don't like, especially in politics.
Fortunately there's an online test.
This is interactive version of the Short Dark Triad
Open Source Psychometrics Project
A number of statements and radio buttons to indicate how much you agree.Your use of this assessment must be strictly for educational purposes. It can not be taken as psychological advice of any kind. If you are interested in anything more than learning about the dark triad of personality and how it is assessed, do not take this test. Your answers will be recorded and possibly used for research and/or otherwise distributed in an anonymous fashion.
There's some difficulty for me answering for such statements as: I like to use clever manipulation to get my way.
How should I respond if I really would like to do that but have discovered the hard way that I suck at it?