What are the tunes called on the b side of born slippy underworld?

That depends on which Born Slippy single you have. There have been two different versions of Born Slippy: the instrumental one (simply called Born Slippy) or the more popular vocal version (called Born Slippy NUXX). According to Discogs, Underworld has released 36 different singles with the title Born Slippy. You can check them all out here to find what you're looking for: a href="http://www.discogs.com/artist/Underworld" rel="nofollow"http://www.discogs.com/artist/Underworld/a