When you are on Facebook or AIM, and you see a person come online who you know is going to talk to you and you don't want to talk to them, so you sign off quickly and swiftly.
Eric: Hey, did you talk to Marc today?
John: Nope. He was gonna talk to me on facebook, but I hate clicked him.
noun. The millisecond in which you realize that you don't love your significant other, you actually hate them. Is typically followed by the "It's not you, it's me..." conversation. Can also happen between friends.
When I realized how much Ed sweats and wipes his smeary face, it was total hate click.