thingamajigs
thin-ga-ma-jigs
noun
A placeholder word for an object whose name is forgotten or unknown.
"Could you pass me those thingamajigs from the shelf?"
Thesaurus
Synonyms: thingumajig, gizmo, whatchamacallit, whatsis, thingummy, widget, dojigger, whatchamacallum, thingamabob, doodad, gubbins, doohickey