What word sums up 2009? How about unfriend?

That’s the New Oxford American Dictionary’s 2009 Word of the Year. It means to remove someone as a friend on a social networking Web site such as Facebook.

Each year Oxford University Press tracks how the English language is changing and chooses a word that best reflects the mood of the year.

Finalists for 2009 also included netbook, which is a small laptop, and sexting, which is sending sexually explicit texts and pictures by cell phone.

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