thingumabob

n : something whose name is either forgotten or not known [syn:

{dohickey}, {dojigger}, {doodad}, {doohickey}, {gimmick},

{gizmo}, {gubbins}, {thingamabob}, {thingmabob}, {thingamajig},

{thingumajig}, {thingmajig}, {thingummy}]