koinophobia

Etymology

Coined by American author and neologist John Koenig, creator of The Dictionary of Obscure Sorrows, from Ancient Greek κοινός (koinós, “common, general”) and the modern English suffix -phobia, itself from the Ancient Greek -φοβία (-phobía, “fear”).

Why this word is great

KOINOPHOBIA — [Noun] The dread of living an unremarkable life, of dissolving into the background hum of the ordinary. Coined by John Koenig from Ancient Greek κοινός (koinós, "common, general") and -φοβία (-phobía, "fear"). Unlike "atelophobia" (which fixates on flaws) or "neophobia" (which recoils from the unfamiliar), koinophobia is the quiet panic of realizing you might never stand out. It is the shudder at the thought of a résumé without boldface, the hollow echo of laughter at a party where no one remembers your name, the way sunlight falls indifferently on both monuments and pavement—proof that the world has no preference for where it shines. The tragedy is not that life is dull, but that we fear it might be.

noun

The fear of having lived an ordinary, mundane life.
The fear of being perceived as boring or uninteresting.