Whatsit vs. Doohickey — What's the Difference?
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Difference Between Whatsit and Doohickey
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Definitions
Whatsit
Something whose name is unknown or forgotten.
Doohickey
Something, especially a small device or part, whose name is unknown or forgotten.
Whatsit
A thing (used in a vague way to refer to something whose name one cannot recall, or that one is embarrassed to say)
Pass me one of those whatsits, will you?
Doohickey
(slang) A thing used in a vague way to refer to something whose name one does not know or cannot recall
What does this doohickey do?
Doohickey
Any object, usually a tool or other device, whose name is forgotten, or not known.
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Doohickey
Something whose name is either forgotten or not known