GRAFFITI

I. transitive verb (-tied; -tiing; also -ting) Date: 1964 to draw ~ on ; to deface with ~ , II. noun Etymology: Italian, plural of graffito Date: 1945 usually unauthorized writing or drawing on a public surface, Usage: Graffiti, which also serves as the plural of graffito, is commonly used as a singular mass noun . This use is well established although not yet as well established as the mass-noun use of data. Use of ~ as a singular count noun is still quite rare and is not standard.