thing·a·ma·jig also thing·um·a·jig 
(thĭngə-mə-jĭg′)
(thĭngə-mə-jĭg′)n.
Informal
Informal
Something whose name is unknown or forgotten.
[Alteration of obsolete thingum (from THING) + JIG1.]
- apostrophic
- apostrophize
- apotemnophilia
- apothecaries' measure
- apothecaries' weight
- apothecary
- apothecial
- apothecium
- apothegm
- apothegmatic
- apothegmatical
- apothegmatically
- apothem
- apotheosis
- apotheosize
- apotropaic
- apotropaically
- app
- APP
- Appalachia
- Appalachian
- Appalachian dulcimer
- Appalachian Mountains
- Appalachian Trail
- appall