Informal any small object or device whose name is not known or is temporarily forgotten
Origin of doohickeyfanciful extension of do, as in doodad
nounpl. doo·hick·eys Informal
Something, especially a small device or part, whose name is unknown or forgotten.
Origin of doohickeyPerhaps doo(dad) + hickey.
- A thing (used in a vague way to refer to something whose name one cannot recall)
- What does this doohickey do?