I Tend To Be Verbose And ...sesquipedalian ses-kwuh-puh-DAYL-yuhn
Adjective: Given to or characterized by the use of long words.
Example: Our dinner guest was so sesquipedalian that no one could understand what he said.
I actually saw this on/in someones question or comment the other day and had to look it up. I actually learned something useful from EP ... imagine that!