Shithead, vicious, evil person that represents a manifestation of all that is wrong with the world... The ultimate worst insult that you can use to describe your friends...
Someone who makes dumbass comments about shit they dont know anything about; the thing you call someone when your mind is so flustered that you scream the first atrocious thing that comes to mind.
I was so pissed I just didnt know what to say, "Jimmy, stop being such a filthycum-guzzling cunt bag!"