VERBIGERATE
Verb
verbigerate (third-person singular simple present verbigerates, present participle verbigerating, simple past and past participle verbigerated)
(intransitive) To repeat meaningless words and phrases, especially as a symptom of mental illness.
(intransitive, obsolete) To talk; to chat.
Source: Wiktionary
Ver*big"er*ate, v. i. [imp. & p. p. -ated; p. pr. & vb. n. -ating.]
[L. verbigerate, -atum, to talk.]
1. To talk; chat. [Obs.]
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.
Source: Webster’s Unabridged Dictionary 1913 Edition