gibber n. + Add to list UK //dʒˈɪbɐ// gib·ber Archaic Informal SynonymsEtymology Synonyms chatterclackgibberishmaunderpalaverpiffleprateprattletittle tattletwaddleEtymology 1 Uncertain; usually regarded as a back-formation from gibberish (see gibberish for more).Etymology 2XDKgiba→ENgibber From Dharug giba.Etymology 3 From gib + -er.