Do you think teenage girls are going to stop saying "OMG" when they find out it dates back to WINSTON CHURCHILL? You know, after we explain to them who Winston Churchill is? Back in 1917, a British World War One admiral named John Arbuthnot Fisher sent a letter to Winston Churchill. Churchill wasn't prime minister yet . . . And in the letter, Fisher uses the acronym OMG . . . then explains it means "Oh my God." That's the earliest that OMG appeared in print.