The Collaborative International Dictionary of English v.0.48:

Verbigerate \Ver*big"er*ate\, v. i. [imp. & p. p.
   verbigerated; p. pr. & vb. n. verbigerating.] [L.
   verbigerate, -atum, to talk.]
   1. To talk; chat. [Obs.]
      [Webster 1913 Suppl.]

   2. (Med.) To repeat a word or sentence, in speaking or
      writing, without wishing to do so or in spite of efforts
      to cease. -- Ver*big`er*a"tion, n.
      [Webster 1913 Suppl.]