Nonsense is an utterance or written text in what appears to be a human language or other symbolic system, that does not in fact carry any identifiable meaning.

Logorrhoea — an excessively wordy style of abstract prose lacking concrete meaning, i.e. nonsense

Examples of logorrhoea

The identity of the official whose alleged responsibility for this hypothetical oversight has been the subject of recent discussion is not shrouded in quite such impenetrable obscurity as certain previous disclosures may have led you to assume, but not to put too fine a point on it, the individual in question is, it may surprise you to learn, one whom your present interlocutor is in the habit of defining by means of the perpendicular pronoun.
("It was I.")

The medical community indicates that downsizing average total daily intake is maximally efficacious in the field of proactive weight-reduction methodologies.'
("Doctors say that the best way to lose weight is to eat less")

A sizeable mass of igneous substance tumbling end-over-end down an inclined plane is unlikely to be adhered to by any statistically significant amount of lichenous material.
("A rolling stone gathers no moss.")