Gibberish is rapid garbled talk that carries no meaning. Talk gibberish, pure gibberish, sounds like gibberish.
It is used both for actual nonsense and for language you cannot follow, which is a judgement about the listener as much as the speaker — technical writing is gibberish to anybody outside the field. The word is imitative of the sound of chatter.
1noungibberishRapid, garbled talk that carries no meaning.
“The baby babbled away in happy gibberish while we tried to eat our dinner.”
gibberish is nonsense.
First recorded in the mid sixteenth century, of unknown origin, probably imitating the sound of rapid meaningless talk.
First attested mid-16th century. Origin unknown. Possibly from gibber, of onomatopoeic origin imitating to the sound of chatter, possibly from or influenced by jabber, ish denoting the name of a language (compare English, Finnish, Spanish, etc.). The verb gibber, first attested circa 1600, is usually regarded as a back-formation from gibberish.
Etymology from Wiktionary, CC BY-SA