A slur is a term that functions to dehumanize and disparage a group of marginalized people

Slurs add to the cultural stigma that marginalized people face.

Many slurs have their origins in medicalized language, so "doctors use it" is not a defense https://twitter.com/ManectricMoon/status/1232769389268586496

The word "obesity" came into common use in the modern age alongside the formation of the thin ideal

as a way for eugenicists to define the "good" races and the "good" white people by ascribing to themselves a type of immediately visually apparent physical superiority

In our current time, "obesity" is the word doctors use to deny people health care

It is the word politicians use to declare war on fat people for daring to exist

It is a demeaning insult meant to discredit the person it is describing

That's a slur

The fact that thin people cannot bring themselves to say fat or even plus sized but they will sling around "obese" like they don't know exactly what they are doing...

Bullshit.
You know.

You always knew, or else why would you be so SMUG about it?

I don't trust people who use the word "obese"

Because they always show their true fatphobic colors eventually

If you thought that "obese" was a more polite way to say fat

You were wrong