whatchamacallit[hwuc̸h′ə mə kôl′it, wuc̸h′-]
Origin of whatchamacallit; from what you may call it
Something whose name is unknown or forgotten.
Origin of whatchamacallitAlteration of what you may call it.
- a metasyntactic term used for any object whose actual name you donâ€™t know or canâ€™t remember. There are many spellings and many synonyms.
Shortened version of "what you may call it" or "what you might call it".