11.defriend also de-friend
11.删除朋友
Definition: to remove someone from your list of friends on a social networking website.
定义：从某一社交网络上的朋友名单中删除某人。
Quotation: Defriending is easier if the person has more than 100 friends.They'll probably never notice...
引文：如果某人（在社交网络里）有100多位朋友，他更容易删除朋友。这些朋友可能永远不会注意到……