About
The Most Annoying Sound in the World is a viral video posted around 2007-08.
Origin
In the 1994 movie Dumb and Dumber, the main protagonists were driving in a fleece covered automobile. One of the protagonists, the one to the left, asks if they want to hear the most annoying sound in the world. Then, he makes a loud screeching noise. The whole scene was unscripted.
Spread
On January 21, 2007, loki69er of Youtube labeled The Most Annoying Sound In The World.
In 2010, fourest of YTMND posted Most Annoying Pop Star In The World.