Thingmajig

A thingmajig is a random object that the speaker can’t quite remember at this moment in time. It might also be a useless invention that has another name (as of the time the speaker is speaking)

1. “Hey Anna Borshun what’s that thingmajig called?”
2. “Hey Sirius Bonner come check this thingmajig I just made”

Note: yes you can use the names but please drop an upvote first