Etymology
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jibber-jabber (v.)
1728, "to talk gibberish," reduplication of jabber (q.v.). Related: Jibber-jabbering. As a noun from 1813, also gibber-gabber. Compare gibble-gabble "idle talk, chatter" (c. 1600). Jibber (v.) is attested from 1824.
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jabroni (n.)

c. 2000, professional wrestling slang for one whose main purpose is to make the better-known wrestlers of the organization look good; he or she does this by losing to them. More commonly known as a jobber, in a specialized sense of that word (though some enthusiasts claim there is a difference), and perhaps a mock-Italianized form of that word (but compare jaboney "naive person; immigrant; hoodlum," a word of unknown origin, in American English use c. 1990). Formerly in pugilism slang such a fighter was a set-up (by 1926).

Jobber — A performer who regularly loses on television and doesn't receive much if any push. A comparable term for such a performer is jabroni, which is a favorite catch-phrase of Dwayne "The Rock" Johnson. To soften the blow of such labels, some wrestling promotions refer to jobbers as enhancement talent. Carpenter was the phrase used by earlier generations. ["The Professional Wrestlers' Instructional and Workout Guide," 2005]
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jabot (n.)
1823, "frill of a men's shirt," from French jabot "gizzard (of a bird), frill on a shirt front" (16c.), a word of unknown origin. Klein suggests a connection with gaver "to cram, gorge," and thus ultimately with English jaw (n.). Of women's clothing from 1869.
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