The most foolish, silly, or absent-minded; superlative form of 'doty'.
Superlative form of 'doty', from the same root as 'dote'—meaning the most extreme degree of silliness or foolishness.
English speakers have always loved exaggerating people's flaws—we can say someone is 'dotty,' 'dottier,' or at the 'dotiest' extreme, creating a funny spectrum of eccentricity.
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