gismo gismo /ˈgɪzmoʊ/

noun

1. [Informal] A device or control that is very useful for a particular job  ( appliance , convenience , gismo [Informal] , contraption , contrivance , gadget , gizmo [Informal] , widget )
   a device or control that is very useful for a particular job
     The latest gadget on the market was a smartwatch.
   The latest gadget on the market was a smartwatch.
   
   
2. [Informal] Something unspecified whose name is either forgotten or not known  ( doodad [Informal, N. American] , doohickey [Informal, N. American] , doojigger , gimmick , gismo [Informal] , gizmo [Informal] , gubbins [Informal, British] , thingamabob [Informal] , thingamajig [Informal] , thingmabob [Informal] , thingmajig [Informal] , thingumabob [Informal] , thingumajig [Informal] , thingummy [Informal] , whatchamacallit [Informal] , whatchamacallum , whatsis [Informal] , widget , dingus [Informal, N. American] , dojigger [Informal, N. American] , doobrie [Informal, British] , doobry [Informal, British] , doodah [Informal, British] , doofer [Informal, British] , doover [Informal, Australian] , thingamy [Informal] , thingo [Informal, Australian] , thingy [Informal] , whatsit [Informal] )
   something unspecified whose name is either forgotten or not known
    She eased the ball-shaped doodad back into its socket
   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
   there may be some great new gizmo around the corner that you will want to use