Is what my boss said inappropriate?

He flirts with me quite often, but this time I was telling him about a disagreement with one of my colleagues. His reply was “well he’s not Fucking you” instead of saying “fucking me over” or “messing with you”…. I just thought it was very odd. I would NEVER say that to an employee! Maybe he’s imagining fucking me so he wanted to say it out loud but act as if it was regarding something else….
Is what my boss said inappropriate?
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