"The Thing-ummy-Bob [That's Going To Win The War]" is a 1942 song, written by Gordon Thompson with music by David Heneker, which celebrates the female production-line workers of World War II making components for complex weapons to win the war. Its chorus is I'm the girl that makes the thingThat drills the hole that holds the ringThat drives the rod that turns the knobThat works the thing-ummy-bob
A thingumabob or thingummy is an extended form of the word thing which the Oxford English Dictionary records being used as far back as 1751.
The song was popularized by performers Arthur Askey and Gracie Fields.