noun informal. : something that is hard to classify or whose name is unknown or forgotten : bobblynushniff. British slang word for "thing-a-ma-bob" or "doo-dad".

/ˈbɒb(ə)li nju ʃnɪf/
"Pass the crumpets and the -- uh -- err -- the bobblynushniff"
by Have a great day! April 9, 2021
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