Word salad

[2] The words may or may not be grammatically correct, but they are semantically confused to the point that the listener cannot extract any meaning from them.

The term is often used in psychiatry as well as in theoretical linguistics to describe a type of grammatical acceptability judgement by native speakers.

Word salad may describe a symptom of neurological or psychiatric conditions in which a person attempts to communicate an idea, but words and phrases that may appear to be random and unrelated come out in an incoherent sequence instead.

[2] Clang associations are especially characteristic of mania, as seen in bipolar disorder, as a somewhat more severe variation of flight of ideas.

In extreme mania, the patient's speech may become incoherent, with associations markedly loosened, thus presenting as a veritable word salad.