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thingamajig

or thing·u·ma·jig

[thing-uh-muh-jig]
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noun Informal.
  1. a gadget or other thing for which the speaker does not know or has forgotten the name.
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Origin of thingamajig

1870–75; thingum or thingummy + jig1, metrically patterned like gobbledygook, rigamarole; thingum perhaps orig. from the gradational compound thingum-thangum (based on thing1) with the same terminal syllable as in crinkum-crankum, harum-scarum, trinkum-trankum, the ultimately orig. of which is unclear
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for thingamajig

Historical Examples

  • By Jove, Madge, I jolly well hoisted him with his own thingamajig!

    The Prodigal Father

    J. Storer Clouston


Word Origin and History for thingamajig

n.

also thingumajig, 1824, see thing.

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Online Etymology Dictionary, © 2010 Douglas Harper