Sesquipedalianist

A person who uses long, unusual, sometimes obscure words in speech or writing.

You can be quite the sesquipedalianist.

by Aneles March 13, 2010

sesquipedalianist

A person who uses unnecessarily large or obscure words.

Example: Will Stocksdale is a sesquipedalianist

by ryangrace101 July 25, 2016