InkHorn 

To talk about some shiznit and think you know about said shiznit but really you don't know jack about said shiznit.

Shorty B was discussing the illuminati, when it was pointed out that he clearly didnt know what he was talking about and was called out to be an Inkhorn

"Shorty you're an inkhorn!! you don't know shiznit!!"

InkHorn by bluegrasshole October 8, 2012

inkhorn 

n. A metaphorical object posessed by those who use very verbose words to sound smart, or posh. Those who constantly borrow from other languages to sound more clever also have an inkhorn. If an person's inkhorn is said to be large, then they come up with inkhorn words more often. People with larger inkhorns will often borrow more words. It especially aplies to people who will chain affixes together to come up with new words such eruditifferous, and anything else. While traditionally people with a bit of an inkhorn would take a large number of words and phrases from french, latin, and ancient greek, today inkhorners can take bits from japanese, latin, spanish, italian, or any other language and smush them together to create large unwieldy terms.

Notes on usage:
It is to be used as a physical object in a metaphorical sense, it is not an aspect of a person's personality. As

Go back to your inkhorn!
It's time you put your inkhorn away and used real words
urban dictionary users need to get off of their inkhorns all of the time!

inkhorn by it wath ich August 21, 2020

Inhorniating 

An action usually resulting in one becoming aroused.

Her amazing figure was inhorniating.

Inhorniating by Dan August 1, 2003

ink horn 

someone who does a lot of writing. usually with a fountain pen, like an old fashioned scribe. Nerdy, geeky that kind of thing.

"you going to that party tonight?"
"nah ive got to do my physics"
"god damn you, you're such and ink horn!"

ink horn by plonk November 19, 2007