logorrhea

This term carries a strong clinical or derogatory connotation, depending on the setting. In a medical context, it describes a specific symptom of psychiatric or neurological distress, such as mania or aphasia, where the patient cannot stop speaking. In a social or academic context, it is used as a sophisticated insult to describe someone who talks too much without adding value, implying that their speech is a "flow" that cannot be controlled.

Because it is derived from the Greek word for "flow," the term suggests a lack of filter or regulation. It is significantly more formal and critical than "loquacious" or "talkative," which can sometimes be seen as positive traits. Using this word typically signals a judgment that the speaker's verbosity is pathological or irritating rather than merely enthusiastic.