Argumentum verbosium, or proof by intimidation is a form of Argument from Intimidation - in this case, by being incredibly verbose, using a plethora of complex words to make one's self sound incredibly smart, and dazzle the opposition. The opposing side will struggle to understand what is being said, and appear to "lose" the debate.
This is an excerpt from the description of the Cognitive-Theoretic Model of the Universe.
- "In the Cognitive-Theoretic Model of the Universe or CTMU, the set of all sets, and the real universe to which it corresponds, take the name (SCSPL) of the required extension of set theory. SCSPL, which stands for Self-Configuring Self-Processing Language, is just a totally intrinsic, i.e. completely self-contained, language that is comprehensively and coherently (self-distributively) self-descriptive, and can thus be model-theoretically identified as its own universe or referent domain. Theory and object go by the same name because unlike conventional ZF or NBG set theory, SCSPL hologically infuses sets and their elements with the distributed (syntactic, metalogical) component of the theoretical framework containing and governing them, namely SCSPL syntax itself, replacing ordinary set-theoretic objects with SCSPL syntactic operators."
Another instance is to argue from "Omega Point" cosmology. 
"a fool's voice is known by multitude of words"
One of the things that scientists and skeptics try to do is distill discussion and arguments down to the simplest and most understandable chunks of information. The purpose is to accurately convey ideas. The author of the CTMU has the primary goal of obfuscation, not explanation. It doesn't matter how smart one is; if one cannot convey the idea in a clear and concise way, that intelligence has gone to waste.
If the person using this type of argument cannot use examples, analogies, or other methods of making it clear, then that person is more interested in dumbfounding you than having an intellectually honest debate.
Some of the most brilliant minds of history, such as Albert Einstein, Isaac Newton and Stephen Hawking, love trying to explain their brilliant ideas to common people, and frequently use analogies and examples to help educate. They didn't use high-end vocabulary to try to sound smart.
These arguments assume things that are not known or could never been known. They are pure speculation. Actual scientific investigations involve testable predictions which are generally absent in these theories.
This dictum is named after computer scientist C.A.R. Hoare, who said, "There are two methods in software design. One is to make the program so simple, there are obviously no errors. The other is to make it so complicated, there are no obvious errors."
This applies to logical arguments as well: you can make the argument so simple that there are obviously no errors. Or you can make it so complicated that there are no obvious errors.
- Cognitive-Theoretic Model of the Universe
- XKCD - Words that End in GRY
- "Hoare's Dictum" at Galileo Unchained blog
- James Redford, "The Physics of God and the Quantum Gravity Theory of Everything", Social Science Research Network (SSRN), Sept. 10, 2012 (orig. pub. Dec. 19, 2011), 186 pp., doi:10.2139/ssrn.1974708.