The website Oxford Dictionaries (not the same as the OED) added a new batch of words this month to its online dictionary. Many are slang, including ship and shipper, words used in discussions of fan fiction and fictional series when referring to characters in the work or series. Originally ship was an abbreviation of relationship, but there is now the verb to ship, meaning 'to support a particular fictional relationship'.
Another abbreviation now with its own entry is perf, short for performance. A forward slash has long been common in writing eg actor/singer, but more and more people are now saying the word eg an actor-slash-singer, so slash in this sense is another new entry.
Thing has a new sense; it’s a thing means ‘it’s an established practice’ or ‘it’s commonly done’. Crazy has gone into the dictionary as an intensifier or submodifier, as opposed to an adjective to recognise the fact that people are saying such things as I’m crazy busy.
I don’t use most of the new words in the updated Oxford Dictionaries Online, but I am familiar with snacky, as in I feel like something snacky. I’ve never used snackier, and snackiest though, which are now also in the dictionary.
For a few more of the new entries, and more explanation, see here.