Definitions:

1. A person who talks constantly, especially about everything. NOUN
   • At the party, Lisa found herself cornered by a jabberer, whose endless stream of anecdotes left her searching for an escape.
2. Refers to someone who speaks rapidly and indistinctly, almost to the point of being difficult to understand. NOUN
   • The professor, known among students as a bit of a jabberer, would dive into complex topics at breakneck speed, challenging even the best note-takers to keep up.
3. Someone whose talk is trivial drivel. NOUN
   • We were impatient for the jabberer to stop, since we had important matters to discuss.

Synonyms:

• babbler
• blabbermouth
• Chatterbox
• gabbler
• prattler
• yakker