adj.
feeling hollowed out by excessive exposure to modern technology, which is so fast and stimulating that it makes everything else feel drab and messy by comparison—as if you’d unwittingly developed a psychological allergy to chaos, which leaves you feeling punchy and lonely and numb, even though your life might be as peaceful and predictable as it’s ever been.
From iron sick, a nautical term for when an old ship’s iron nails become rusted out, allowing seepage of seawater through the wooden hull.