noun

1. something unspecified whose name is either forgotten or not known

e.g. 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

Synonym: doodaddoohickeydoojiggergimmickgizmogismogubbinsthingamabobthingumabobthingmabobthingamajigthingumajigthingmajigthingummywhatchamacallitwhatchamacallumwidget