Unwanted art

• Government service ready with independence in writing
• Scribblings on the walls of buildings
• Scrawl on a wall
• The writing on the wall

Wikipedia Word definitions in Wikipedia
Graffiti is writing or drawings scribbled, scratched, or sprayed illicitly on a wall or other surface in a public place. Graffiti may also refer to:

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Graffiti \Graf*fi"ti\, n. pl. [It., pl. of graffito scratched] Inscriptions, figure drawings, etc., found on the walls of ancient sepulchers or ruins, as in the Catacombs, or at Pompeii. any writings or drawings on a surface in a public place, placed there ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1851, for ancient wall inscriptions found in the ruins of Pompeii, from Italian graffiti, plural of graffito "a scribbling," a diminutive formation from graffio "a scratch or scribble," from graffiare "to scribble," ultimately from Greek graphein "to scratch, ...