Over a thousand new words, phrases, or new senses of existing words have been added to the OED over the past quarter. They include flexitarian, first attested in 1998, which refers to a person who mostly, but not entirely, eats a vegetarian diet, and pescatarian (first attested in 1991), which is a person who will eat fish, but not meat.
OED lexicographers usually wait several years before adding a word to the Dictionary, to check that it is more or less a permanent fixture of the language, and there are therefore fewer than a hundred words in the entire Dictionary that date from 2000 or later. Until this latest update the 'youngest' word in the dictionary was crowdsourcing(2006), but 'younger' words in this batch include hashtag (attested from 2007) and the even younger word copernicium (a new radioactive element, whose name was only officially approved in 2010, although the word was found in print in 2009).
Upcycling, which is ‘the operation or process of reusing waste materials to create a product of higher value or quality’ has just gone into the OED. Interestingly, the Dictionary has discovered that the word das Upcycling appears to have been used in German before making its appearance in English.
Other new entries include the interjection Goddammit and Godself, a pronoun used to refer to God to avoid the use of the masculine pronoun himself.
Read more about the new entries here.