To jabber, talk rapidly and unintelligibly or incoherently.
Gibberish, unintelligible speech.
A balky horse.
A stone or rock, of chalcedony or similar mineral, found strewn over arid regions of inland Australia; a gibber stone.
To speak lacking expertise, authority, or knowledge; to invent or fabricate facts.
To assert something as true or valid; to bluff.