definition of
gismo

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

[2] #2 gismo n. [appliance, contraption, contrivance, convenience, gadget, gizmo, widget] a device or control that is very useful for a particular job. wn