Jibber-jabber appeared in Abel Boyer’s 1751 English/French Dictionary – defined as ‘to speak gibberish’. What is a jibber jabber mean? jibber-jabber in British English (ˈdʒɪbəˌdʒæbə) noun. foolish or worthless talk; nonsense. verb. to talk foolishly; babble. Is jibber jabber nonsense? Gibberish, also called jibber-jabber or gobbledygook, is speech that isRead More →