dingus

[ ding-uh s ]

/ ˈdɪŋ əs /

a gadget, device, or object whose name is unknown or forgotten.

Origin of dingus

1870–75; < Dutch dinges or its source, German Dinges, probably orig. genitive, with partitive value, of Ding thing¹

To the only woman on earth who sings base enough, they sends this dingus and the organ-grinder.

A Man in the Open |Roger Pocock
The French telephone resembles a dingus for curling the hair.

Europe Revised |Irvin S. Cobb
This other dingus was undoubtedly a typewriter—and this small gadget on the desk a stapler.

The Mighty Dead |William Campbell Gault
And they think you were eccentric in furnishing this room—they think the broad couch and that Japanese dingus are absurd.

Main Street |Sinclair Lewis

I wouldn't be puttin' that dingus on my head for all the colleens in Ireland.

Off Course |Mack Reynolds (AKA Dallas McCord Reynolds)