noun one who jabbers.
2. jabber ·noun rapid or incoherent talk, with indistinct utterance; gibberish.
3. jabber ·vt to utter rapidly or indistinctly; to gabble; as, to jabber french.
4. jabber ·vi to talk rapidly, indistinctly, or unintelligibly; to utter gibberish or nonsense; to chatter.