The practice of, while intoxicated, friending people on facebook that you don't know, barely know, or who actively hate you. This usually leads to embarassment the following day when the friend request is rejected, goes unanswered, or results in a hostile message back but no friend confirmation.
"After I got home from the bar last night, I drunkfriended Kyle. I totally forgot about it until this morning when I got a message from him and all it said was 'LOL'."
"Marla, you really need to stop drunkfriending people. You're just embarassing yourself."
In social networks, a defriending frenzy is a situation where an oversupply of friends leads to rapid, out-of-control deletion by the account owner. This situation often results in the accidental deletion of real friends, leading to refriending requests.
John: What's this friend request? I thought we were already friends...