In short, a person that is such a jerk that he or she makes even jerks look like nice people by comparison. Hence the name shit disturber; the idea being that even something as offensive as excrement would find the person offensive.
see also: Kanye West, Kanye'd, Ye'd, ultimate douchebaggery, asshole
He stole the spotlight shamelessly from Taylor Swift at the 2009 VMAs, proclaiming Beyonce had one of the best videos of all time. Someone really needs to take that bottle away from his dumbass