The UNfriend-zone 

It is when your friend finds a new piece of ass/interest and you soon find yourself becoming nonexistent to them. Its more common between a male and female friendship then a same sex friendships.

Megan: "Hey have you noticed since Brad started talking to Kelly he stopped talking to me."
Steve: "Sorry to say this but no matter how you look at it you are in The UNfriend-zone."

The UNfriend-zone by Dat Vern August 17, 2012

Preemptive unfriending 

When one deletes a friend from Facebook because he or she knows that the Facebook friend in question would eventually delete them instead. Preemptive unfriending thus robs the deleted Facebook friend of the joy of being able to delete them.

John: Why'd you delete Bec from you friend list?
Adam: I knew she'd eventually delete me so I wanted to take the satisfaction of unfriending for myself.
John: Ah, a preemptive unfriending.

Preemptive unfriending by AntonBordman August 31, 2012

eco unfriendly 

a person or object that is extremely against saving the world

chainsaws are very eco unfriendly

eco unfriendly by ___^^))__ April 28, 2008

Unfriend

The act of removing a friend from your facebook account.

Compulsive people prune their friend list periodically, removing people that they no longer have contact with. More often though, unfriending is only done when a particular friend's updates and self-promotions become so annoying that you can no longer stand hearing about them. Or you might unfriend someone when they piss you off, however, this is not very effective since the person who is unfriended is not notified that you unfriended them and you'd be better off to keep them as a friend and plot your revenge.

Dude, did you fucking unfriend me on facebook? I was looking for your email address and you're not in my friend list anymore. WTF?

Unfriend by maktar June 13, 2008

umfriend 

a person with whom you are in a physical, but not necessarily romantic, relationship

also uhm-friend, uhmfriend, um-friend

"Oh...Hi mom, this is Steve my um...friend"

umfriend by mr.tickles August 22, 2005

unfriend

Verb: taking someone off your networking page (i.e., facebook, myspace, etc.).

Suzy thought Joe was being rude, so she had to unfriend him from her page.

unfriend by pcer November 18, 2009

umfriend 

Noun used to describe someone who you are banging, in the stage before she is your legitimate girlfriend

"Oh Hi guys, I hope you don't mind that I brought my um...friend Ursula to our poker night"

umfriend by Stan July 27, 2004