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Pronunciation varies by accent · noun
(informal) A person or thing that one does not know the name of..
Use whosiewhatsit when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Whosiewhatsit means (informal) A person or thing that one does not know the name of..
Common synonyms include thingy.
The opposite depends on the specific sense.
Use whosiewhatsit where its definition matches the intended context.
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