bank·sy (bank see)
1. A generic term for stenciled street art.
2. A general slang term for easily done street art
that mimics commercial advertising.
3. A term used to describe a graffiti artist who has "sold out" by becoming financially successful through the system he originally spoke out against.
"yo, did you see that banksy Pablo did on the school bus? Total wack
"Several banksy style images have appeared in the run up to the election, including a print of David Cameron" - wired.com