Verbal diarrhoea is a term commonly used to reference an individual who talks uncontrollably, typically without much purpose or value. Some synonyms for this term might include loquaciousness, garrulousness, or rambling, as they all reference a tendency to speak at length without a clear point. Other synonyms might include chatterbox, motor-mouth, blabbermouth, or babble, as they all reference the tendency to speak excessively or without restraint. Ultimately, all of these terms describe an individual who has difficulty controlling the flow of their speech and may struggle to communicate effectively or efficiently.