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thingumabob

thingamabob

/ (ˈθɪŋəməˌbɒb) /
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noun
informal a person or thing the name of which is unknown, temporarily forgotten, or deliberately overlookedAlso: thingumajig, thingamajig (ˈθɪŋəməˌdʒɪɡ), thingummy (ˈθɪŋəmɪ)
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Word Origin for thingumabob

C18: from thing 1, with humorous suffix
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

How to use thingumabob in a sentence

  • It had just been a game they had played while looking for the thingumabob.

    Gargoyles|Ben Hecht
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