Derogatory for a willfully problematic person not only intent on not helping anyone but himself, but doing things to hinder others. The true bastard is one to twelve steps lower than an asshole, because nobody needs a bastard. Assholes are needed to let shit out. Bastards push you into shit for their own amusement.
1- What kind of bastard takes the bolts off a port-a-john?
2- You're intentionally making the arguement worse, you bastard.