doohickey
nounUK /ˈduːhɪki/
US /ˈduːhɪki/
A doohickey is a small thing whose name you do not know.
Can you hand me that little doohickey on the table?
OTHER MEANINGS
2. A small part or piece of a machine that you cannot name.
He fixed the car with a doohickey he found in the toolbox.
3. An unnamed or forgotten object.
There were doohickeys all over the messy drawer.
4. A gadget used for a job you do not fully understand.
The new kitchen doohickey slices apples in seconds.