I really think it is inappropriate and disrespectful for anyone, but Christians especially, to use phrases like "OMG" or anything similar. I know, I know ... "but I substitute 'gosh' for God, so it's not the same." Yes, it is the same. Scripture says to 'let your yes be yes and your no be no." God's name is holy, we need to honor that. So, please, let's not denigrate the Savior to the point where He is just an exclamation for emphasis. There are plenty of other phrases to use. Eliminate "OMG" in your speech and your texts.