All this response does is underline the fact that you’ve got a tendency to overreact. Your comparison of “hello fatty” isn’t remotely similar and is a daft comment.
As a society, many people use colloquialisms in greetings - even in the workplace. Love, darling, lovely, hon, mate, duck, pet…..the list is endless. “hi gorgeous” or “hi beautiful” aren’t a judgement on appearance necessarily. It’s often considered a “nice” way to greet someone when it’s meant genuinely. I often start messages to friends with “hey beautiful” and they do to me too. I’m no stunner but it’s a friendly opener. It’s nothing to do with how I look.
Misogyny is real.
The patriarchy is real.
But not getting offended by a common greeting doesn’t mean that you don’t believe it.
Men don’t greet men like that because it’s treated as weird in our culture. And that’s a shame.
You don’t have to like the greeting and it’s fine to tell someone to stop. But it’s not automatically misogynistic or harassment. Sure, if you ask him to stop and he doesn’t, then report it to HR if you feel it’s deliberate.
I guess my question is what is his usual behaviour like? Is he sleazy? Handsy? Flirtatious and inappropriate? Does he call everyone by terms of endearment or just you? If it’s part of a wider picture of behaviours or you feel targeted then I can see why it would be so problematic and absolutely deserves to be taken further. I think context matters.
But if it’s a genuine and good natured greeting then I think it’s a bit of a shame that it’s automatically denounced as a controlling, misogynistic piece of bullying. Of course, you can still tell him to stop even if he thought he was just being nice!
Maybe we’re all so sick of male entitled behaviour and oppression of women that we’re ready to pounce rather than considering the wider picture ie/that he was maybe just trying to be nice. And some people WOULD consider this nice - I probably would tbh.
If he’s a misogynistic dick in general, that would change my view but I couldn’t see anything else described by OP?