a.k.a. defriend

To remove someone as a "friend" on a social networking site such as Facebook. It's considered a serious breach of a friendship to unfriend someone, and if you decide you want to be friends with this person again, you will have to send a new friend request.

Historical perspective: "Unfriend" was named the "2009 Word of the Year" by the New Oxford American Dictionary.

See also : social notworking  poke  
NetLingo Classification: Online Jargon