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When two people think they're on the same page, but they're actually talking about completely different crap, like they're both just making stuff up.
You: 'We’re gonna crush this project.' Him: 'Yeah, I’m gonna crush the coffee.'
Her: 'We’re gonna be rich.' Him: 'I’m rich at the gym.'
You: 'We’re gonna win.' Him: 'I’m winning at solitaire.'