refers to a humorous flash animation/video, circulating over the internet, which deals with the threat of nuclear warfare
'end of ze world' has become an internet meme, with many memorable phrases entering daily usage (see tags)

one place you can watch the animation is on this website: endofworld dot net

the author has not been established yet (as there are no credits whatsoever), but presumably someone who lives in california :)
by gimmejunkmail June 26, 2011
Get the end of ze world mug.