gibberish \gib"ber*ish\ (?), n. [from gibber, v. i.] rapid and inarticulate talk; unintelligible language; unmeaning words; jargon. he, like a gypsy, oftentimes would go; all kinds of gibberish he had learnt to known. such gibberish as children may be heard amusing themselves with. gibberish \gib"ber*ish\, a. unmeaning; as, gibberish language.
Gibberish and gobbledygook refer to speech or other use of language that is nonsense, or that appears to be nonsense. It may include speech sounds that are not actual words, or forms such as language games or highly specialized jargon that seems non-sensical to outsiders. Gibberish should not be confused with literary nonsense such as that used in the poem "Jabberwocky" by Lewis Carroll.