shashisesquipedalianism

An author's tendency to find and use the longest and weirdest words in the dictionary by means of android apps and/or google to impress readers and listeners .

Guy 1: What do you think of the words 'Floccinaucinihilipilification" and "hippopotomonstrosesquippedaliophobia", used by Shashi Tharoor while introducing his latest book "The Paradoxical Prime Minister "?

Guy 2: I'd say it's a case of shashisesquipedalianism.