speech using nonsense syllables along with words in a rapid patter.

deliberately evasive or ambiguous language

When you try to get a straight answer, he gives you double-talk.

to engage in double-talk.

to accomplish or persuade by double-talk.

noun

blather , blatherskite , gabble , gibberish , jabber , jabberwocky , jargon , nonsense , prate , prattle , twaddle , abracadabra , gobbledygook , mumbo jumbo