Princeton's WordNet

1. jabber, jabbering, gabble(verb)

   rapid and indistinct speech

2. rant, mouth off, jabber, spout, rabbit on, rave(verb)

   talk in a noisy, excited, or declamatory manner

Wiktionary

1. jabber(Noun)

   Rapid or incoherent talk, with indistinct utterance; gibberish.

2. jabber(Verb)

   To talk rapidly, indistinctly, or unintelligibly; to utter gibberish or nonsense.

3. jabber(Verb)

   To utter rapidly or indistinctly; to gabble.

Origin: Imitative.

Webster Dictionary

1. Jabber(verb)

   to talk rapidly, indistinctly, or unintelligibly; to utter gibberish or nonsense; to chatter

2. Jabber(verb)

   to utter rapidly or indistinctly; to gabble; as, to jabber French

3. Jabber(noun)

   rapid or incoherent talk, with indistinct utterance; gibberish

4. Jabber(noun)

   one who jabbers

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