Wow, you sure thought a lot about the modes of swearing and insulting *g* It's something I never gave a second thought since I practically never swear. LOL It's interesting, I think the fact that the word 'bitch' bled into the general language as a verb and adjective is one of the reasons why I nearly don't perceive it as an insult anymore when I hear it in English. It's good to know that there's still a difference between 'bitching' and calling someone a bitch. LOL

Well, Dean gets Ruby pretty worked up, but I indeed think it's less because he insults her than because he just always manages to thwart her plans, no matter what she tries. Although I thought it was funny that in the end she lost her nerves and called Dean a 'spineless dick', which indicates that he got under her skin nonetheless. The enraged tantrum that she throws after Dean trapped her shows that behind her cool facade she's just a bitch. LOL I think the fact that Dean outsmarted her hurt her more than his insults, no matter how elaborated they would have been.