Banksy

Banksy was a human graffiti artist.

Carla Langer told Sarah Jane Smith that Clyde Langer wanted to be the new Banksy. (TV: The Mark of the Berserker)

Amy Pond told the Eleventh Doctor that Banksy and Damien Hirst put out statements that the Shakri cubes had nothing to do with them. (TV: The Power of Three)

The Eleventh Doctor called a young man who had used a spraying can in Rokhandi World "Banksy Junior". (COMIC: The Friendly Place)