doohickey
1. [ noun ] something whose name is either forgotten or not known
Synonyms: dojigger doodad gimmick gizmo gubbins thingamabob thingumabob thingmabob thingamajig thingumajig thingmajig thingummy gismo hickey dohickey
Related terms: whatchamacallit
Similar spelling:   dohickey