If you describe a speech or piece of writing as someone's ramblings, you are saying that it is meaningless because the person who said or wrote it was very confused or insane.
[disapproval]
The official dismissed the speech as the ramblings of a desperate lunatic.
ramblings in British English
(ˈræmblɪŋz)
plural noun
speech or writing that is confused or meaningless
Examples of 'ramblings' in a sentence
ramblings
She knew only too well the truth of Beth's words since she herself was often hard put to avoid the old ladys lengthy ramblings.
Fraser, Christine Marion NOBLE BEGINNNINGS (2001)
From his disjointed ramblings, I gathered he didn't like doctors much.