Internet slang added to Oxford dictionary. 'NSFW,' 'Twittersphere,' other Internet slang added to Oxford Dictionaries. The Oxford Dictionaries Online has officially declared “NSFW,” “newb” and “Twittersphere,” among other Internet slang terms, real words. The dictionary, which is considered one of the preeminent authorities on the English language, is actively taking steps to incorporate the language used online into the approved lexicon.