The first known use of O.M.G. was in 1917, in a letter sent to Winston Churchill.
At The Chronicle of Higher Education: A breathtakingly ballsy piece by an anonymous professional writer of academic papers — friend to non-native speakers, the rich and lazy, and the hopelessly dim. Whatever your professor wants, he delivers (for a fee, of course). This Ed Dante might remind you of Vitaly Borker, the charmingly unapologetic (and equally ballsy) thug internet retailer profiled by David Segal in the NYTimes a few weeks back.