thingumajig

noun

1. something unspecified whose name is either forgotten or not known
   1. she eased the ball-shaped doodad back into its socket
   2. there may be some great new gizmo around the corner that you will want to use

   Synonym:    doodaddoohickeydoojiggergimmickgizmogismogubbinsthingamabobthingumabobthingmabobthingamajigthingmajigthingummywhatchamacallitwhatchamacallumwhatsiswidget