Whatchamacallit definition

wŏchə-mə-kôlĭt, wŭch-, hwŏch-, hwŭch-
Something whose name is unknown or forgotten.
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A metasyntactic term used for any object whose actual name you don't know or can't remember. There are many spellings and many synonyms.
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noun
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Other Word Forms

Noun

Singular:
whatchamacallit
Plural:
whatchamacallits

Origin of whatchamacallit

  • Alteration of what you may call it

    From American Heritage Dictionary of the English Language, 5th Edition

  • Shortened version of "what you may call it" or "what you might call it".

    From Wiktionary