The New Oxford American Dictionary has chosen its Word of the Year: Unfriend.
unfriend – verb – To remove someone as a ‘friend’ on a social networking site such as Facebook.
“’It has both currency and potential longevity,’ notes Christine Lindberg, Senior Lexicographer for Oxford’s US dictionary program.”
Most “un-” prefixed words are adjectives (unacceptable, unpleasant), and there are certainly some familiar “un-” verbs (uncap, unpack), but “unfriend” is different from the norm. It assumes a verb sense of “friend” that is really not used (at least not since maybe the 17th century!). Unfriend has real lex-appeal.”
Other words in the running included sexting, zombie bank, and tramp stamp (“a tattoo on the lower back, usually on a woman.”)