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thing·a·ma·jigalso thing·um·a·jig (thĭng′ə-mə-jĭg′)
Something whose name is unknown or forgotten.
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|Noun||1.||thingumajig - something unspecified whose name is either forgotten or not known; "she eased the ball-shaped doodad back into its socket"; "there may be some great new gizmo around the corner that you will want to use"|
gismo, gizmo, gubbins, thingamabob, thingamajig, thingmabob, thingmajig, thingumabob, thingummy, whatchamacallit, whatchamacallum, whatsis, widget, doodad, doohickey, doojigger, gimmick
stuff - miscellaneous unspecified objects; "the trunk was full of stuff"