Superlative form meaning most cliquish or most exclusive in group behavior.
From 'cliquey' + '-est' (superlative suffix). A nonstandard formation; 'most cliquish' or 'cliquiest' are preferred.
When we compare '-y' words, we often get awkward forms like 'cliqueiest' instead of the smoother 'cliquiest'—it shows how English speakers constantly negotiate their language in real-time!
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