Doodad informal noun
Used to indicate a name of gadget or item whose true name is unknown or has been forgotten.
A: Give me that doodad to fix my car. B: Here you go.
Is this the little doodad you lost, Mark?
I'm afraid that we can't afford to buy that doodad.
Said of one who directly takes charge of numerous duties including vital or small daily tasks within an organization
She opened the local hotpot restaurant and called herself as the chief cook and bottle washer.