whatchamacallit Hear it!

whatchamacallit definition

what·cha·ma·callit (hwuc̸h′ə mə kôl′it, wuc̸h′-)

noun

Informal thingamajig

Etymology: < what you may call it

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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