Oh boy, this song's got a complicated history. In fact, it's title is actually "Born Slippy.NUXX." You probably recognize it from Danny Boyle's film Trainspotting, but Underworld first released it in 1995 as the b-side to an instrumental track called "Born Slippy" -- the ".NUXX" suffix was randomly added to the mix's working title by a computer, so they left it. After this version was used in the film, it became a big, world-wide hit, reaching #2 on the UK pop charts in July 1996. And what's a "born slippy"? It was the name of a greyhound taken from a racing form.