Talking rapidly and continuously in a way that is hard to understand or is annoying.
From Middle English 'jabber' of uncertain origin, possibly from Old Norse 'kobba' meaning to strike, suggesting quick repeated sounds. The meaning evolved to mean rapid, unclear speech.
When people get nervous or excited, they naturally start jabbering—scientists found that speaking speed increases when adrenaline levels rise, which is why excited people babble faster than calm ones.
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