mod. carelessly and awkwardly built. : The lawyer's case was jerry-built, but the jury bought it anyway.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
jerry-built
1869, Eng. dial. jerry "bad, defective," a pejorative use of the male nickname Jerry (a popular form of Jeremy), or from naut. slang jury "temporary," which came to be used of all sorts of makeshift and inferior objects (see jury (adj.)).