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1. Telling your friend/friends to stfu and stop whatever they are doing
2. Telling your horse to stfu and stop whatever it is doing
3. An exclamation for extreme disbelief
Man 1: So then i was like "OMFG" and then i was like "OMG HOW COULD THAT HAPPEN OMG OMG-"
Man 2: Wo wo wo! No! What the hell r u saying?!
by Sogeking8 December 15, 2013
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