Any sort of examples would be awesome (I'm sure there are plenty of religiously-based vulgarities), but I'm specifically looking for language associated with sex/genitals, like whether the term "balls" was in use then at all. I know it was extremely taboo to use that kind of language in the Victorian era, but the situation is very, very casual.
On a related note, how would someone in England go about getting a hold of prohibited works such as The Lustful Turk or The Autobiography of a Flea? Or any sort of lewd things such as that. I know that my character could subscribe to Sir Richard Francis Burton's publisher for a private edition of the sexually explicit One Thousand and One Nights; were there any other sorts of privately-printed books like that? My character can use any means to get a hold of something if he's interested in it, I just need to know if there was some sort of black market for this kind of thing.
ETA: I now have a huge amount of slang resources, those will keep me busy for a while! Thanks so much everyone.