The superlative form of gabby, meaning the most talkative or prone to talking excessively.
From 'gabby' (talkative, from gab meaning to talk idly) plus the superlative suffix '-est.' The root 'gab' likely comes from Middle English or Old Norse origins, referring to idle chatter.
Language lets us measure talkativeness with 'gabbier' and 'gabbiest'—but interestingly, there's no truly neutral way to describe someone who talks a lot; the word itself judges them!
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