Kilroy, the bald guy with the long nose hanging over a wall, may be the world’s first viral meme. While it didn’t originate with U.S. servicemen in World War II, it resonated with them. And Kilroy has had staying power all over the world, well after the war ended.
The graffiti originated with a British doodle called “Mr. Chad,” who commented on rationing and shortages during the war. Often accompanied by the phrase “Wot? No Sugar”, “Wot? No engines?”, or anything decrying the lack of supplies in Britain at the time.