朗文词典对此的释义是:在社交网站上，将某人的“朋友”身份删除:To remove someone from your list of friends on a social networking site.
Although many believe that the idiom 'fast friends' means friends who developed a liking for one another quickly， the term is actually a shortened form of 'steadfast friends.'“熟词偏义”是英语中常见的情况，其实fast除了我们熟悉的“快的”的意思之外，也有很多解释。
Telegram作为隐私安全性较强的社交软件，有时候可能会遇到账号被限制不能向陌生人私信的问题。显示“Sorry, you can only send messages to mutual contacts at the moment.”（抱歉，您现在只能给双向联系人发送消息。
