defriend
verb [ T ] uk/ˌdiːˈfrend/ us/ˌdiːˈfrend/ (also unfriend)
在网络社交平台上将某人从好友名单上去除
to remove someone from your list of friends on a social networking website
How do I check who has defriended me on Facebook? 怎么才能查谁在脸书上把我从好友名单上去除了？