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A Future One Night Stand is when you hit the sack with someone and then immediately give them two thumbs up while screaming Arthur Fonzarelli’s legendary ‘Eyyyyyy…’ like you just won the lottery and your mom finally stopped yelling at you.
Just had a F. O. N. S. and yelled 'Eyyyyyy...' so loud my neighbor called the cops. Worth it.
Met this guy at the bar, we had sex, and then I gave him two thumbs up. Classic F. O. N. S.
I had a F. O. N. S. and now I’m famous. My mom thinks I’m rich.