To talk a lot, usually in a gossip or chatty way without much important information.
From Irish 'gob' or Gaelic 'gab' (mouth), or possibly from Old English 'gibber.' The word became common in English to describe idle chatter.
The phrase 'the gift of the gab' comes from Irish folklore—the Irish have a cultural tradition of storytelling and eloquence, which is why the phrase specifically references Irish people and remains popular in English.
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