You are rude

I am completely amazed at what our new employee deems appropriate to do and say in the workplace. General consensus is that most (not all) of us are totally offended, but won't say anything because he is supposed to be our senior and we feel like we have to just get used to it.

As the only girl I'm not okay with being called "sweetness", or the time when he said "why are all these banks closing?!" and then told me "it's okay, I don't expect you to know anything about it".
That's fine, I don't expect you to know anything about me.
I doubt my Aboriginal coworker is okay with hearing the word "niggaz" being spouted, as well as the remark made the other day whilst we were listening to hip hop that he "feels so black".
Another exchange which apparently happened of course while I was out of the office - one coworker joked that another was a girl. The new guy then loudly exclaimed that he couldn't be - "his tits are too small and his clit is too big". Because that's FUNNY!!

The dynamics of our office team have been fantastic until now. We've all known each other for such a long time we either literally are family, or as close as you can get to it. Perhaps we are having a hard time adjusting, but I don't feel I should have to adjust to things I find so blatantly outrageous and offensive.
At the end of the day, I feel there is more ridiculous bullshit coming from him than there is work, which is the largest problem.