- a gadget; dingus; thingumbob.
Origin of doohickey
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- US and Canadian informal another name for doodah (def. 1)
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
Word Origin and History for doohickey
also doohicky, a name for something one doesn't know the name of, 1914, American English, arbitrary formation.
Online Etymology Dictionary, © 2010 Douglas Harper