sumpsimus [ suhmp-suh-muhs ]
noun, plural sump·si·mus·es for 2.
1. adherence to or persistence in using a strictly correct term, holding to a precise practice, etc., as a rejection of an erroneous but more common form (opposed to mumpsimus).
2. a person who is obstinate or zealous about such strict correctness (opposed to mumpsimus).
HOW TO USE SUMPSIMUS IN A SENTENCE
We are not going to change our old 'mumpsimus' for anybody's new 'sumpsimus.'
RES JUDICAT|AUGUSTINE BIRRELL
Sumpsimus, sump′si-mus, n. a correct expression displacing an incorrect but common one (see Mumpsimus).
CHAMBERS'S TWENTIETH CENTURY DICTIONARY (PART 4 OF 4: S-Z AND SUPPLEMENTS)|VARIOUS
On being remonstrated with, he retorted that “He would not leave his old mumpsimus for their new sumpsimus.”
ROBIN TREMAYNE|EMILY SARAH HOLT
Origin: First recorded in 1540–50; see origin at mumpsimus
Now YOU come up with a sentence (or fic? or graphic?) that best illustrates the word.