Cadillac converter

Ca·dil·lac con·vert·er
UK/ˈkædɪlæk kənˈvɜːtə/US/ˈkædəˌlæk kənˈvɝtɚ/US[-ɾɚ]

noun

Synonym of catalytic converter (“chamber containing a finely divided platinum catalyst in which carbon monoxide and hydrocarbons from vehicle exhaust are oxidized to carbon dioxide”).

Meanings

nounCadillac converter (plural Cadillac converters)

plural Cadillac converters

  1. Southern UShumorousnonstandardoftenmalapropismSynonym of catalytic converter (“chamber containing a finely divided platinum catalyst in which carbon monoxide and hydrocarbons from vehicle exhaust are oxidized to carbon dioxide”).

    We were a strong competitor throughout the competition, but then the Cadillac converter fell off, which hurt our emissions and place in the overall standings.

    2011 November, Robert Hartwell Fiske, “cadillac”, in Robert Hartwell Fiske’s Dictionary of Unendurable English: A Compendium of Mistakes in Grammar, Usage, and Spelling with Commentary on Lexicographers and Linguists, revised edition, New York, N.Y.: Scribner, →ISBN, page 86
    2 more examples

    Anyway, wherever he was, all he ever talked about was Cadillac converters and pipe. His work with pipe paid off when he was awarded the honor of "Repairman of the Week."

    1992, Ricardo Cortez Cruz, “The Bloods and the Crips, Starring Billy Bugle Boy”, in Straight Outta Compton, Normal, Ill.; Boulder, Colo.: University of Colorado; Fiction Collective Two, →ISBN, page 65

    He then asked, “What is a Cadillac converter?” At this point, I'm thinking he doesn't know much about cars; therefore, I went on to explain. From the look on his face, I knew he was setting me up for an attack. He replied, "The proper words are catalytic converter."

    2008, Gilbert A. Knowles, “Why Listen to Me?”, in Help Them Pull Their Pants Up: How Mentors and Communities Can Empower Young African American Men, Bloomington, Ind.: iUniverse, →ISBN, part I (The Preamble), page 28

    Synonyms: catalytic converter

Synonyms & antonyms

nounSynonym of catalytic converter (“chamber containing a finely divided platinum catalyst in which carbon monoxide and hydrocarbons from vehicle exhaust are oxidized to carbon dioxide”).

Origin

From the similarity between catalytic and Cadillac (“brand of luxury automobile”), probably originally a mondegreen (“error arising from the mishearing of a phrase”) and used humorously to allude to the high cost of catalytic converters.

Full word history & related roots →

Rhymes & wordplay

Rhymes with Cadillac converter

All rhymes →
Cite this entry
APA

Cadillac converter. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Cadillac%20converter

MLA

“Cadillac converter.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Cadillac%20converter. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “Cadillac converter,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Cadillac%20converter.

Source: Cadillac converter on Wiktionary, CC BY-SA 4.0.