Douglas Harper's Etymology Dictionary
Wiktionary
alt. 1 (context idiomatic English): Lies, especially in a formal political statement. 2 (context idiomatic English) Speech which combines English and English-sounding gibberish for humorous effect. 3 A simple phonetic code with a regular infix that makes meaningful speech sound unintelligible. 4 (context telephony English) A situation when two people talk at the same time, causing overlapping audio signals. n. 1 (context idiomatic English): Lies, especially in a formal political statement. 2 (context idiomatic English) Speech which combines English and English-sounding gibberish for humorous effect. 3 A simple phonetic code with a regular infix that makes meaningful speech sound unintelligible. 4 (context telephony English) A situation when two people talk at the same time, causing overlapping audio signals.
WordNet
n. deliberately unintelligible gibberish
Wikipedia
Double Talk is an American game show that aired on the ABC network from August 18 to December 19, 1986. The show was a Bob Stewart-produced word game which borrowed elements from Stewart's previous show Shoot for the Stars and his then-current editions of Pyramid.
Double Talk was hosted by actor and frequent Pyramid panelist Henry Polic II. Bob Hilton announced for the first two weeks, with Johnny Gilbert replacing him for the remaining sixteen.
Near the end of its run, the show was retitled Celebrity Double Talk. However, no format changes took place with the change in the show's title.
Usage examples of "double talk".
I was thinking that if I managed to get by the Martians without a slip I would undertake to ad-lib double talk to a bunch of human reporters as long as they wanted to listen.
Some twenty miles earlier I had happened to tell her that the day school she would attend at Beardsley was a rather high-class, non-coeducational one, with no modern nonsense, whereupon Lo treated me to one of those furious harangues of hers where entreaty and insult, self-assertion and double talk, vicious vulgarity and childish despair, were interwoven in an exasperating semblance of logic which prompted a semblance of explanation from me.