whatchamacallit
whatc·ha·ma·callit
noun
1.
Origin
Univerbation and contraction of what you may call it. United States, 20th century (recorded in 1921).
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.