To put it politely, someone that is a jerk to a point where even
jerks find the person annoying and/or
aggravating to deal with.
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.
We were having a peaceful discussion on a message board. Although we couldn’t come to an agreement, we were able to end the discussion like mature adults and agreed to disagree. Just as we were at the stage of leaving it at that and
moving on, some troll barges in and starts flaming both of us, igniting a massive
flamewar that lasted for months before the moderators finally put an end to it. I’ve seen some offensive people in my life but before I encountered this guy, I’d met few people that would qualify as a shit
disturber as this person does.