I had a friend for many years who would do this. To be clear, this person was otherwise a decent friend and I had good times with them. But they would constantly declare, loudly, to everyone, how fat they were. They would make constant comments on how fat, their relatives were. They'd insist that other people were making special arrangements for them because of their fatness.

No matter how many times people would assure this person that we largely did not care or consider their weight as any factor in hanging out with them or interacting with them, they would deny it. No matter how many times I or anyone else carefully suggested that there may be some value in speaking to a therapist about their anxiety around their weight, they would not listen.

This same person would also complain how much fat shame society as a whole inflicts. But they refused to acknowledge their own.

It is sad, and infuriating, and it eventually pushed me and many other people away.