Fat person speaking here. I don’t think it’s a slur. But it IS pejorative and derogative. It’s in the same category as words like stupid and ugly. Are they slurs? Technically no. But we’re socialized from a young age to view them as negative descriptors. I understand that fat is also a medical term. But to that point, so is the r slur. Words change meaning over time. The power a word has over you is what you give it.
If someone called me fat, I’d use that as a positive reinforcement to get up and lose weight. Why do people just cry about everything now days? That’s why I refuse to have friends under the age of 30 now days because they were born with hurt feelings and everything offends them. Grow up and worry about real life problems.
I think i wouldn’t compare it to the r slur because fat is also a Thing. like, fats are in food, fat is on your body, etc. I would compare obese MORE to the r slur than fat to the r slur, bc obese is used more negative in the way r slur is but fat can be entirely neutral imo! (-also fat person)