look up any word, like cunt:
When you see a girl that has no boobs or is flat. 404 Error is an error on computers when a URL is not found or is non existent.
Dan: wow look at that Chick!
Bob: nice features, ass is good, but no tities.
Dan: ya, when i see her chest, im like 404 Error: Boobs Not Found.
by Voldemortism May 02, 2011