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Definition of thingummybob

thingummybob

/ˈθɪŋ.ə.miˌbɑːb/
thing · um · my · bob
Plural:thingummybobs
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thingummybob Lexical Profile

thingummybob Game Scores & Validity

• noun

1

British A person or thing whose actual name one has forgotten, does not know, or does not wish to specify.

Example

"Could you pass me that little metal thingummybob from the bottom of the toolbox?"

Synonyms
View all synonyms for thingummybob

• Nearby Words

thingumajig
thingumbob
thingummy
thingummybob
thingy
think
thinkable

Word Origin & Etymology

First recorded in the mid-18th century, this playful placeholder word is a colloquial elaboration of 'thing' combined with a rhythmic extension and the terminal element 'bob'.

Cite this Entry

Wordmom. (2026). Definition of Thingummybob. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/thingummybob
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