gismo
gis-mo
noun
A small, often new or unfamiliar, mechanical or electronic device or gadget.
"He's always buying some new electronic gismo."
Thesaurus
Synonyms: thingumajig, gizmo, whatchamacallit, whatsis, thingummy, widget, dojigger, whatchamacallum, thingamabob, doodad, gubbins, doohickey