Sarah's week of doom & gloom on Blog of the Nation continues with this little nugget: The New Oxford American Dictionary's word of the year is "unfriend."
Per the Oxford University Press blog,
unfriend — verb — To remove someone as a 'friend' on a social networking site such as Facebook.
Unfriend. As in, I don't care about what you had for breakfast, I don't like looking at that picture of you in my social networking feed, I'm through, I unfriend you.