Definitions

1. noun

An unfamiliar or unidentifiable object, often used to describe something that cannot be remembered or named.

“I was trying to describe the strange gadget to my friend, but all I could come up with was ‘thingummy’.”

2. interjection

An expression of puzzlement or frustration, often used when trying to recall a forgotten word or concept.

“Thingummy, what’s the name of that actor?”