logorrhea

noun3

1. •
   Excessive and often uncontrollable speaking due to a mental disorder.

   • But, then, these persons have not only a copia verborum as to knowledge, but a volubility sometimes amounting to a logorrhoea in expressing what they know—although that may not be much. — 1874
2. •
   (humorous) Excessive talkativeness.

   • His purchase of a Dictaphone no doubt encouraged his natural loquacity, his ingrained prolixity (which he himself logorrhoea). — 2013
3. •
   (humorous) Excessive use of words in writing; prolixity.

   • The early period of glasnost' encouraged a variety of graphomania and logorrhea—from numerous letters to the newspapers to memoirs, "true stories," opinions, and revelations of wide political range. — 1994