gibberish /ˈd͡ʒɪ.bə.ɹɪʃ/noun 3adjective 1forms 3 noun3 •Speech or writing that is unintelligible, incoherent or meaningless.Such gibberish as children may be heard amusing themselves with. — 1850 •Needlessly obscure or overly technical language. •A language game, comparable to pig Latin, in which one inserts a nonsense syllable before the first vowel in each syllable of a word. adjective1 •unintelligible, incoherent or meaningless formsgibberishes · more gibberish · most gibberish