While this may be offensive to refer to someone you don’t know, if both parties agree, it’s okay to call your friends names. And you have your inside jokes, and references. During a scene in the documentary the two of them play cards and have an on-going batter. Kevin calls him a “b*tch,” and asks “Are you rich? If everything stopped today, could you survive [without me]?”
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Boss responded saying, “Yes.” Kevin retorts, “You are a liar?”