graffitigraffiti /grəˈfit̮i/ noun [uncountable] 
writing and pictures illegally drawn on the walls of buildings, trains, etc.: There was racist graffiti on the walls. [Origin: 1800–1900 Italian graffiare to make marks in a surface]
writing and pictures illegally drawn on the walls of buildings, trains, etc.: There was racist graffiti on the walls. [Origin: 1800–1900 Italian graffiare to make marks in a surface]