from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Informal Something difficult to classify or whose name has been forgotten or is not known.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Something that one does not know the name of.
from The Century Dictionary and Cyclopedia
- n. A thingumbob.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. something unspecified whose name is either forgotten or not known
Alteration of obsolete thingum (from thing) + jig1.(American Heritage® Dictionary of the English Language, Fourth Edition)