A term used to describe an action where a large friend group shares girlfriends and boyfriends. Think of once a relationship is over, one or more people in the relationship begin to date friends within the mutual group.
When you try to find out about something through friends of friends of friends etc. Basically a massive game of Chinese Whispers that will end with you finding out absolutely nothing. Alternatively a general term to describe an incredibly convoluted group of people. Yes, this is an Inception joke.
'Oh my god, don't even bother, that'll be the craziest Friendception ever.'
'Honestly his social circle is a complete Friendception.'
The act of cutting out the de-friending of a Facebook friend. In other words, adding someone back after they are removed from the friend list on someone's Facebook page.
Joe was de-friended?? no way! Bob needs to perform a Joe de-friendectomy, i.e. re-friend Joe now!