Similar to the concept of defriending, defraternization occurs when a person removes a friend or a sibling from their list of family members on their facebook profile. It usually occurs when a person decides to finally get 'serious' about facebook or they no longer regard the other person as a brother/sister.
Ex 1. ARJUN: Dude can you believe Aparna just defraternized me from facebook? She said something about how she wants to only keep her real siblings on facebook. Lame!
Ex 2. JEFF: Man this guy Pete is really annoying and I don't consider him my bro anymore. I'm gonna defraternize him.
People who continue to make up their own words and language because they and their parents lack the ability to educate them. Dedraters are usually found in low income city settings but are sometimes also found in rural areas as well.
Dat dedrater be aktin a str8 foo when da pigs be rollin OD.