A word used to call something when you don't know or can't think of what to call it. examples; whotamawhatter, hidgedinky, watchamacallit, thingamajig, Dohickymajobber.
synonyms: thingamabob, whatschamacallit, the likes
basically a bunch of random nonsense or a thing of little moral, economical, political, cultural, monetary, or entertainment value