or what·cha·ma·call·it, what-you-may-call-it, what-do-you-call-it
Origin of whachamacallit
Examples from the Web for what-do-you-call-it
Historical Examples of what-do-you-call-it
The what-do-you-call-it is so well done, and I like that broad effect.
Claudia shall do the Venus business, and I'll be a what-do-you-call-it?The Head Girl at the Gables
I suppose the what-do-you-call-it massacre was in one of your little wars on the frontier.The Letters of her Mother to Elizabeth
W. R. H. (William Rutherford Hayes) Trowbridge
If I hadn't known him since he was so high, I'd wish he had the what-do-you-call-it seizures instead of the other man.Quisant
College is out of the question for him, poor boy, unless he entered himself as a what-do-you-call-it?A Charming Fellow, Volume I (of 3)
Frances Eleanor Trollope
1928, compressed form of phrase "what you may call it." Earliest recorded variant is what-calle-ye-hym, attested from late 15c.