My Sn stands for beg for/seek wisdom.
It is meant more internally then externally, as in I beg for/seek wisdom, not conceitedly like you should beg for my wisdom, which would just be kind of ridiculous.
I picked the name up in Jr. high school, originally it was just Pled (which if you get me really drunk i will tell you the story, but it's not something I am to proud of) it later became my stage name as a rapper and a graff head. I now use it or some variation on most of the sites I belong to. There are people I have known for 15 years, I have keys to there house, but they don't know me outside of the nickname.
One day I will just go by my given name, maybe when I get old, like 30.