OMG

or omg

Oh my God! (used to express surprise, alarm, etc.)

Origin of OMG

from its use in digital communications

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for omg

Author Veronica Roth was only 22 years old when she began writing the novels and…OMG, guuuys, you can totes tell.
Beseech Your Children Well With Plot-Spoilers|Bill Schulz|March 27, 2014|DAILY BEAST
This is what a well-executed “OMG” moment actually looks like.
‘The Good Wife’ Perfects the ‘OMG’ Television Moment|Chancellor Agard|March 24, 2014|DAILY BEAST
Simpson found that OMG easily dates back to the 1980s, and even has an outlying instance in a 1917 letter to Winston Churchill.
The Oxford English Dictionary: The Original Crowdsourcer|Josh Dzieza|April 29, 2013|DAILY BEAST
My mind is racing”) and the ecstasy of getting a spot (“OMG, OMG, OMG thank you!
Stuck in New York City Private School Wait List Hell|Eliza Shapiro|February 14, 2013|DAILY BEAST

Popular phrases embedded in these tweets include "PLEASE FOLLOW," "Hey Justin," "OMGOSH," "vote," and "OMG OMG."
Meet the Beliebers: Justin Bieber's Insane Twitter Fans|Brian Ries|September 10, 2010|DAILY BEAST

British Dictionary definitions for omg

OMG

abbreviation for

Oh my God!: used esp in emails, text messages, etc

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012