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M. F. O. I. is when you're at a party and you're hitting on girls or just hanging out with them. It’s like you're trying to look cool, but deep down, you're just nervous.
Yo, I'm doing M. F. O. I. right now. I’m talking to three girls and pretending I don't know you.
I'm at the party and I'm doing M. F. O. I. with the hot one. Don't text me, I'm busy.
I'm doing M. F. O. I. like it's my job. I'm not even pretending anymore.