Definition of "gibberish"
noun
usually uncountable, plural gibberishes
Speech or writing that is unintelligible, incoherent or meaningless.
Quotations
Could it be, after all, that the whole story was true, and the writing on the sherd was not a forgery, or the invention of some crack-brained, long-forgotten individual? And if so, could it be that Leo was the man that She was waiting for - the dead man who was to be born again! Impossible! The whole thing was gibberish! Who ever heard of a man being born again?
1886 October – 1887 January, H[enry] Rider Haggard, She: A History of Adventure, London: Longmans, Green, and Co., published 1887
adjective
comparative more gibberish, superlative most gibberish