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.
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."