General Negativity:
* Blabber: To reveal secrets or gossip, often carelessly.
* Chatter: To talk excessively and often meaninglessly.
* Jabber: To talk quickly and incoherently, often with a high-pitched voice.
* Prate: To talk foolishly or at length about something unimportant.
* Rattle on: To talk endlessly and in a boring way.
* Spit out: To say something quickly and forcefully, often with anger.
Deceitful or Dishonest:
* Lie: To say something that is untrue.
* Misrepresent: To give a false impression of something.
* Twist: To distort the truth or meaning of something.
* Fabricate: To invent something false.
Aggressive or Confrontational:
* Barrage: To attack verbally with a rapid succession of words.
* Berate: To scold or criticize someone harshly.
* Harangue: To lecture someone in a forceful or aggressive way.
* Scold: To reprimand someone angrily.
Insincere or Superficial:
* Gush: To speak in an excessively enthusiastic or insincere way.
* Waffle: To speak in a hesitant or evasive way, often changing your mind.
* Brag: To boast about oneself or one's achievements.
* Wheedle: To persuade someone with flattery or false promises.
The best synonym for you will depend on the specific context and the tone you want to convey.