You refer to something or someone as thingummy, thingummyjig or thingummybob when you do not know or cannot be bothered to use the proper word or name for them.
[informal, spoken]
I once bought a thingummy out of one of those catalogues.
I must say, I mean, it sounded like er thingummyjig all over again without the politics.
thingummy in British English
(ˈθɪŋəmɪ)
noun
another word for thingumabob
Examples of 'thingummy' in a sentence
thingummy
It was David thingummy --- Stevenson --- Dad's clerk of chambers or whatever he is.
Jane Asher LOSING IT (2002)
But we had to reshoot the scenes at the villa between Judy and the blackmailer, after Arthur's heart attack, with - thingummy - Jeremy Fox.
Hinxman, Margaret THE SOUND OF MURDER (2002)
`You bribed Elvis to plant a thingummy in Harry Sheiling's computer!