gibberish

Gibberish, also known as jibber-jabber or gobbledygook, is speech that is (or appears to be) nonsense: ranging across speech sounds that are not actual words, pseudowords, language games, and specialized jargon that seems nonsensical to outsiders.

Gibberish is also used as an imprecation to denigrate or tar ideas or opinions the user disagrees with or finds irksome, a rough equivalent of nonsense, folderol, balderdash, or claptrap. The implication is that the criticized expression or proposition lacks substance or congruence, as opposed to being a differing view.