adj. Someone who, with the SLIGHTEST provocation, defriends someone on facebook, myspace, etc.
Josh: "Soc, why did you defriend me on Facebook?"
Soc: "I didn't like that you had a dream about my sister. Plus, I heard you didn't like my tie."
Josh: "Wow, you're more fucked up than i thought. You're really defriend-happy if those were your reasons."