- 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)
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