Most Victorian slang, was used only by the lower class (mostly the lowest class). There are six different kinds of slang :
Cant: Which is the jargon or a group often implying its use to exclude or mislead people outside the group. Groups that often used this kind of slang where gypsies, thieves and beggars. It was meant to represent a type of vernacular.
Cockney Back-slang: A secret language in which each word is pronounced as if it was spelled backwards.
Cockney Rhyming Slang: A type of slang in which words are replaced by a word or a phrase they rhyme with.
Shelta/Tinker: A type of slang used by Irish travelers. Much like a cant it is meant to be spoken among people of the same group to exclude or mislead others outside the group.
Romany: The slang used by gypsies.
and Boxing: Slang taken from the sport of boxing which was very important in Victorian England.