I'm going to call out a fatfish friend
Why would you say she's a "fatfish"? I never hear of this term.
It's not becaue of her weight, it's because of her selfish behavior.
If your friend is behaving badly and hurting others with her behavior, then you should talk to her about it. You should sit down with her and speak privately, not call her out publicly, because that would be rude and she would be less willing to listen.
How dare you call my friend fat. I will hunt you down and kill you.
I didn't call her fat at all, just scroll up and see what I wrote. I am impressed and surprised by your action though, because it seems to me you care a lot about your friend and are willing to commit murder on her behalf. That is some extreme loyalty there.