jabber (v.) Look up jabber at Dictionary.com
"talk rapidly and indistinctly," 1650s, spelling variant of Middle English jablen (c. 1400), also javeren, jaberen, chaveren, jawin; probably ultimately echoic. Related: Jabbered; jabbering. The noun, "rapid, unintelligible talk" is 1727, from the verb. Related: Jabberment (Milton).