jam nut

noun

lock nut(def 2).

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Nearby words

jalopy, jalor, jalouse, jalousie, jam, jam nut, jam session, jam-pack, jam-packed, jam-up, jam.

Origin of jam nut

First recorded in 1860–65

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019