Military phonetic alphabet for "O.M.F.G", a widely used acronym for "Oh My Fucking God".
"Hey bro, bad news. You know the chick who gave you the blowjob under the table at Applebee's the other night? Just found out, she wasn't always a chick..."
"Oscar Mike Foxtrot Golf!!"
"Oh, that wasn't the bad news - She has chlamydia."
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