1. ranting and pretentious speech/writing (also used as an adjective)
2. a thick natural fiber cloth
► uses
Uses:
A treatise written about fifty years ago by a Welsh gentleman of Cambridge. His name, as I remember, Vaughan, as appears by the answer to it by the learned Dr. Henry More. It is a piece of the most unintelligible fustian that perhaps was ever published in any language.— S. This piece was by the brother of Henry Vaughan, the poet.
Jonathan Swift. A Digression in the Modern Kind (footnote)
---
Yossarian was unmoved by the fustian charade of the burial ceremony, and by Milo's crushing bereavement.