"Verbal diarrhea" is a phrase used to describe someone who talks too much and says unimportant or unnecessary things without control or awareness. It means excessive and incoherent speaking. Full definition
This will halt any tendency towards verbal diarrhea and keep your match on their toes. (eharmony.com)
Stream of consciousness vlogs are just as often instances of verbal diarrhea as they are cases of memorable communication and unedited webcast videos of events and panels are even worse. (inc.com)
You may be cursed with verbal diarrhea and find it difficult to limit the number of words you write. (careercoachbethany.com)