All it is is a fat sin/lowpassed saw wave for the sub part of the bass. I'm assuming you're talking about the tops on it though mainly, in which case it's a super simple formula to get the actual sound and the real flavor comes from how it's modulated.
basically you start with some saw waves detuned to taste. Add some distortion, then some phaser/chorus/notch filter/flanger/whatever phasey effect you think sounds good. Then more distortion, then more phasey stuff, more distortion, more phasey, etc etc etc. Once you get to the point where you're happy with what you've got bounce it to audio and load it up in a softsampler like kontakt or something and start playing around with some filter modulation stuff. Sounds like he's just playing fairly low notes and has the whole sound highpassed to get it nice and squelchy.
edit:
it's pretty much the same process you'd use to make a dark dnb style reece/bassline, posted some other tips in a thread here a few weeks back:
http://www.infekted.org/virus/showthread.php?t=30924