Thingamajig's origination is unknown but maybe the most well known place would be sim city 2000 where one of the industrial buildings where named "Thingamajig". Thingamajig describes something you have no idea how to describe.
by D00M March 15, 2005

When you are trying to say somthing but you forgot the word/thing. (helps if you point at the thing)
by Robojoe July 23, 2016

When the correct name of whatever you're speaking about is forgotten magically and you end up spouting this gibberish word
Not very smart guy: hey you know those, uhhh, beep boop typey thingamajigs in the computer room
Smart guy: the COMPUTERS?
Not very smart guy: uhh, yeah those
Smart guy: the COMPUTERS?
Not very smart guy: uhh, yeah those
by Sir Beans of Heinzington March 24, 2023

by M.E. ~a person who paints September 14, 2020

i love that… thingamajig
by pinkhairedpoop May 11, 2025

by Word999 October 11, 2019
