What atheists use to start most of their exclamatory sentences.
Abbreviation for 'Oh My Non-existent God!'
Theist: You can't disprove the existent of God.
Atheist: OMNG, I don't think I can explain the concept of burden of proof to you one more time!
Theist: Jesus loves you, you know.
Atheist: OMNG, would you please step off my lawn!