The realm, kingdom, or practice of fibs and lying; the world of small falsehoods treated as an amusing or social domain.
From 'fib' combined with the suffix '-dom' (as in kingdom, dukedom, officialdom), creating a humorous abstract noun for the dominion of fibbing.
Fibdom is a brilliantly playful word—it treats lying like a whole kingdom with rules and inhabitants, which is exactly how it feels when you notice someone consistently fibs. English -dom words let us turn abstract concepts into imaginary empires.
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