The DICT Development Group

  thingamajig
      n 1: 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" [syn: doodad,
           doohickey, doojigger, gimmick, gizmo, gismo,
           gubbins, thingamabob, thingumabob, thingmabob,
           thingamajig, thingumajig, thingmajig, thingummy,
           whatchamacallit, whatchamacallum, whatsis, widget]