C2 noun /ˈdʒɪb.ər.ɪʃ/
gibberish
無意味な言葉
Meaning
Unintelligible or meaningless speech or writing.
Example
He was so nervous that his explanation sounded like gibberish.
彼はとても緊張していて、説明はまるでジブリッシュのように聞こえた。