The idea that if you're discussing a viewpoint or theory that is highly contentious or controversial, if you make it seem like it is much too complex for the average person to understand, and only comprehensible to a select few, enlightened individuals in a secret
smart-person
club (such as yourself, of course), by using a lot of jargon and esoteric references that only other people in your very exclusive
circle will get, then it
will fool the general public into thinking that it must obviously be correct because it's "complicated", and discourage anyone from questioning it (and also, jerk yourself off for being so
smart).
Note: This does NOT apply to fields that actually are just extremely difficult to understand and over most people's
heads (rocket science, quantum physics, nuclear engineering, etc.). This is when you take something that really isn't all that complicated, and act like it is, to give it an air of legitimacy.
When radical communists discuss Marxist
theory online, and go on about stuff
like "praxis" and the finer points of Bolshevism
vs. Trotskyism and other shit that nobody who isn't glued to a computer 24/7 has even heard of or gives a flying fuck about, they are engaging in obscurantism.