Why use a whole sentence when one word will do…even if that one word is longer than the original sentence. 
A guy by the name of Michael Longcor introduced me to this one-Rhinotellexomania.
Pneumonoultramiscroscopicsilicovolcanoconioisis; been a favorite of mine since I discovered it in the dictionary when I was like 10 years old.
Sesquipedalian. First of all, it describes itself. Second, I like the way it sounds and tastes. Third, it’s perfect for Clerlihews.
Linguistically, I’m rather fond of poronkusema:
It’s bad enough to link to a seven-minute video with no explanation. Even worse is a really annoying seven-minute video.
Don’t know if they’re my favorites, but I have a weakness for the names of complex mathematical solids
Even the relatively simple Dodecahedron and Icosahedron. But then the Cuboctahedron and Rhombicuboctahedron and the Rhombicosidodecahedron and other Archimedean solids that can be described with a single word.
Can I list a second one? It’s a word I learned a couple of decades ago that I have never once seen used in anything not written by me; I’ll use it in a sentence and y’all can see if you can guess the meaning from the context:
President Donald Trump is a fucking snollygoster.
snollygoster: a shrewd, unprincipled person, especially a politician.
I’ve always been sentimental about antidisestablishmentarianism and coprophagia. Wait, let me rephrase that…
Koyaanisqatsi.
Deliquescence. I just learned this word yesterday in a poem on that poetry site Garrison Keillor does the podcast for.
While it is not a long word, it has four syllables, which I suppose makes it sufficiently polysyllabic. Since I was a young lad, I have been a fan of suffonsify, meaning satisfied. My grandfather often would use it as follows after an inquiry if he wanted more food at dinner, “My sufficiency has been suffonsified; any more would be a copious redundancy.” I learned years later that the word was used mainly in Canada and Michigan, an area from which he hailed.
I’m going with tintinnabulation for some reason.
Have you met my friend hippopotomonstrosesquipedalian?
Me, I like susurration.
Diabolical.
antidisestablishmentarianism is always a good one.
Good word; great film!
Obviosity.
[quote=“Snowboarder_Bo, post:6, topic:797427”]
President Donald Trump is a fucking snollygoster.
And a twitterguffer
“Absquatulate,” which was a mock-Latin word in pre-Civil War America meaning “to get the hell out of here.”
“Defenestration,” meaning the throwing of something out of a window. When I was teaching rowing and canoeing at Scout summer camp many years ago, I put up a sign at the waterfront reading “Absolutely no defenestration allowed.” In those pre-cellphone days, no one knew what it meant but me. (There are even two historical examples, both in Prague: Defenestrations of Prague - Wikipedia).
Callipygian
*Prestidigitation *is the first thing that came to my mind. I’m also partial to exsanguination, defenestration, mendacity, and corpulence.