'OMG'
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16 Times Urban Dictionary Defined Words Better Than The Oxford Dictionary

10. 'OMG'
"Net-centric abbreviation for the popular exclamation "Oh my God!" (generally used in conversations to exclaim surprise or disgust). Most commonly used by teenage girls who find it depressingly hard to type out an entire word. Reinforces assumptions that humans seem to be getting dumber from generation to generation." Picture: Urban Dictionary