The first known use of the abbreviation "OMG" was found in a letter to Winston Churchill, written in 1917.
The first recorded use of the abbreviation "OMG", which stands for "oh my god," "oh my gosh" or "oh my goodness," was from a letter written in 1917 by Lord Fisher to Winston Churchill. In the letter, Lord Fisher jokingly refers to a new order of knights signified by the letters "O.M.G" (Oh! My God!). Many decades later, the abbreviation became a part of textspeak -- the common abbreviations used by people who are communicating via text messaging or through social media.