We already established that calling a department “big momma” was very wrong. She herself acknowledged that it’s wrong.

She didn’t bully you though. You keep saying that you “think” she feels this or that. Your thoughts and feelings are valid but they aren’t facts. You can’t make reports for something you feel other people might be thinking about you.

You think and feel all kind of negative thoughts about many people. You can’t be punished for that because those are just your thoughts. But with this woman you don’t even know what she’s thinking. You just assume

She could actually feel insecure about her weight the same way you are insecure about yours. That’s why maybe she talks about it. Same with being petite. Finding petite clothes is hard. Maybe that’s why she’s talking about it.

Of course you could report people for anything and everything but would it make you happy? HR would likely ask why do you think she was talking about you and your weight? Are you going to say “I think she was talking about me”? That’s just not how it works.