Origin of yabber; from yabba, word in a language of Australia
intransitive verbyab·bered, yab·ber·ing, yab·bers
Origin of yabberFrom Australian pidgin, probably from a source in the Pama-Nyungan languages of southeast Australia such as Wiradhuri ya-, to talk (perhaps influenced by English jabber).
(third-person singular simple present yabbers, present participle yabbering, simple past and past participle yabbered)
Most likely a modification of the Wuywurung yaba, ("speak"). Dated to 1855.