sorrynotsorry is a term used by someone usually unhappy with someone because they are thought to have done something wrong. They use this term as if to say "What I did wasn't wrong so Sorry, I'm not sorry". It is often "hashtaged" on the social networking website Twitter.
Craig: "You're holding that pencil wrong"
Mike: "I didn't know there was a correctway to hold a pencil. sorrynotsorry"
A guy that gets away with pretty mucheverything by being casually sorry. Allows himself to be douchy but is charming at the same time, so people won't pay too much attention to his mistakes, only his closest friends see that he is a sorryboy.
G: "hey Vincent, there's no cigarettes left!?"
V: "yeah man I had a beautiful girl over and we smoked the rest, sorry"
A: "man he's such a sorryboy..."