hyperverbal

From hyper- +‎ verbal.

hyperverbal (comparative more hyperverbal, superlative most hyperverbal)

1. Highly verbal; tending to talk very much.
   • 2009 April 5, Mark Harris, “Fifth Alarm for That Haunted Fireman”, in New York Times‎^[1]:

     If it haunts him, it’s going to haunt his alter ego. Mr. Leary, 51, who is also a producer of the show, isn’t Tommy Gavin, but the resemblance is no accident: both men are Irish-Americans, lapsed Catholics, sometime hockey players and prone to hyperverbal explosions of caustic wit.