The practice or behavior of being a criticaster; petty, shallow criticism.
From criticaster plus -ism, a suffix forming nouns denoting practices, beliefs, or systems. This is a highly specialized word combining Latin-rooted suffixes.
This word is so niche that most dictionaries don't include it—it's the kind of word that academics might invent to describe something they find particularly annoying, then the word quietly disappears because nobody else needs it.
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