a fault-finder ...1597 obs.
from Momus, a Greek divinity, the god of ridicule who for his censures
upon the gods was banished from heaven + -ist
FIRST DOCUMENTED USE
1597 - see Example below
"...abate the furie of many insulting momistes who think nothing
true but what they doo themselues."
From: A Plain and Easy Introduction to Practical Music
By: Thomas Morley, 1597
• A New English Dictionary on Historical Principles,
James Murray, 1887-1933
• The Century Dictionary and Encyclopedia,
William Dwight Whitney, 1889-1891