Derived from "unfriending" someone on Facebook, to "unfriend" somebody in the real world is to stop acknowledging their presence. Instead of looking at them as you pass by, basically you just ignore them as if you had never met them.

Getting unfriended is especially weird when you know somebody by virtue of your participation in a group or team — which normally gives you at least a mild sense of camaraderie — but the person who unfriends you still insists on basically ignoring you.

to get unfriended means to get defriended

The act of removing someone from your Facebook 'Friends List'. Or in other words acting like a 'Girl'. If you're a dude and you do this, you should consider growing some.

unfriend: noun. 1) An enemy. 2) A misbehaved friend. 3) An object that displeases.

Some shitty horror film that came out in spring of 2015 about a dead chick who kills her friends with computer hacking and supernatural ass-fuckery. Whoever thought this was a compelling plot device should be thrown off the back of a speeding pickup truck and into a river in a body bag, weighed down with cinderblocks.

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.

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.