Song in a video (link included)

Hey all.

Was aimlessly watching vids on metacafe and came across this one:
Just Plain SICKNESS!! Video

All I want to know is the name of the song and the artist, I've tried lyric search engines and everything I could find, and no luck.

Please help...

Thanks.

By the way, I hope this isn't misunderstood as an ad for the site or something, because it really isn't.