What does "thingamajigger" mean?

An item that one does not know the name of.

What is a synonym for "thingamajigger"?

Common synonyms include: thingy.

noun, slang

noun, slang ·Uncommon ·College level

Noun

1
An item that one does not know the name of. informal
"What was that thingamajigger he was playing with during school?"

"What was that thingamajigger he was playing with during school?"