sexy nurse?

My first choice for a halloween costume this year was to go as "that girl from university". I was prepared to borrow some uggs, some lulu lemon pants, a university hoodie, large pink backpack, and of course, the useless miniature purse. Most people wouldn't think I was dressed up, and that is the genius behind it! The joke is on 99.5% of the female population at my university. However, a problem in my plan was that I didn't know how to acquire said items without insulting certain people, and my intense exam schedule that is happily still existent post-halloween hinders my party potential.  Regardless, after some time well wasted on an internet study break, I discover Dita Von Teese has the same idea as me. She's kind of a freaky-deak not in costume, and dated Marilyn Manson so I don't really know what to make of that... um,

anyone have any good costume ideas?