Maudcat

Hi, Lacey. Stay strong. Think about what you will tolerate and what you can't, then act accordingly.
when she tells you that she can say whatever she wants and if you don't like it you don't have to talk to her, take her up on it.
Don't talk to her. If you are in her presence, leave.
Don't do this if she is at your place, of course. Could be tricky.
I guess what I am saying is that, as someone else posted, you set your boundary for you.
But once you have set it, be prepared to fight more than once to keep it.
Beyond the alcohol and maybe some mental unhinging, your mom sounds like a bully.
There are many ways to deal with bullies. I hope you find the one that works for you.
Peace.