floccinaucinihilipilification:
floc·ci·nau·ci·ni·hil·i·pil·i·
fi·ca·tion noun
rare
noun: floccinaucinihilipilification
the action or habit of estimating something as worthless. (The word is used chiefly as a curiosity.).“my new book is more than just a 400-page exercise in floccinaucinihilipilification.“
Courtesy my Arts Editor.