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Thingamabob is a very informal word for an object whose name you don’t know, have forgotten, or can’t recall at the moment.

It’s often used to refer to gadgets or parts of things that might not even have a commonly known name, as in Before we attach the bracket, we have to insert this thingamabob here.��

Thingamabob is sometimes used even if you know the name of the thing you’re referring to. It can be used to be dismissive or to downplay the importance or value of an object, such as when someone is admiring it, as in What, these old thingamabobs? I’ve got a whole boxful of ’em. Take as many as you want.��

Less commonly, it can be spelled as thingumabob or thingumbob. There are several other similarly informal words that are used in the same way, including thingamajig, thingy, whachamacallit, whatsit, doohickey, and doodad.

Example: My kids got me one of those thingamabobs that track your steps. What’s it called? A stepometer?

The first records of the word thingamabob spelled in that way come from the 1800s, but other spellings have been used since at least the 1700s. The first part of the words thingamajig and thingamabob comes from the word thingum, an informal variant of the word thing similar to thingy. The word bob is used in the sense of a kind of object that’s attached to the end of something.

Have you got a junk drawer full of thingamabobs? The word is especially used to refer to small, physical objects, but its ambiguous nature means it can be used for all kinds of things (which is really the point of a word like thingamabob). Sometimes, it’s used just to be a bit funny, even if you actually know the name of the object you’re referring to.

What are some other forms related to thingamabob?

• thingumabob (alternate spelling)
• thingumbob (alternate spelling)

What are some synonyms for thingamabob?

• thingamajig
• thingy
• doohickey
• doodad
• doodah
• whachamacallit
• what-do-you-call-it
• whatsit
• whatsis
• dingus

What are some words that share a root or word element with thingamabob?��

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• thing
• bob

What are some words that often get used in discussing thingamabob?

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• gadget
• gizmo
• device
• contraption
• object
• item
• forget
• name

Thingamabob is very informal. It’s especially used in speech as a way for the speaker to refer to something whose name they don’t know or can’t remember at that moment.

Anyone know the name of that thingamajig that we use to pry(?) off staples? You know, that thingamabob that looks like two pairs of fangs?

— 🍒まぶし🥢 (@rckyryalty)

I've notice the older I get the more I call things "Thingamabob"
"The thingamabob is on the counter. You know…the paring knife."
"I put the thingamabob in the shed…… the weed eater."

— @PeggyOBiden™ #Resist (@PeggyBrava)

You can't remember where you put the key to that thingamabob in the whatchamacallit.

— Ellen Garrison (@EllenTrailerDog)

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Is thingamabob used correctly in the following sentence?

This darn thingamabob doesn’t even work anymore—can you pick up another one at the store?