is there a disorder for talking too much
Compulsive talking (or talkaholism) is talking that goes beyond the bounds of what is considered to be socially acceptable. The main factors in determining if someone is a compulsive talker are talking in a continuous manner or stopping only when the other person starts talking, and others perceiving their talking as a problem. Personality traits that have been positively linked to this compulsion include assertiveness, willingness to communicate, self-perceived communication competence, and neuroticism. Studies have shown that most people who are talkaholics are aware of the amount of talking they do, are unable to stop, or do not see it as a problem.
Compulsive talking