AITAH for telling my mom to stop calling me Crab?

My mom always calls me "Crab" when she's in a bad mood or thinks I am (which most of the time I'm not, it's just her projecting her anger at me). She'll just suddenly start yelling Crab at me and complaining and I don't like that because as an adult and mom she stoops to calling me a name I don't like just bc she's annoyed.

I told her I don't like her calling me Crab, especially since in the past she's called me other names before like fatso, chubby, chunky, bitch, fatty, and piggy when I was a kid and now that she's stopped that she's resorting to crab. The nicknames aren't new, but I've been called crab for a long time and I've told her repeatedly I don't like it but she keeps doing it when she's angry (and she's always angry).

I got home from school today in a good mood and asked how her day was, she immediately started calling me Crab and yelling at me from across the house bc she had a bad day and I was the only one she could take her anger out on. I told her to please stop calling me crab and continued faking a good mood and she got even more upset and cried to my dad on the phone that I was being a bitch. Now my dad's mad at me but I don't think I'm TA for asking to not be called a nickname. So, AITAH for telling my mom to stop calling me "Crab"?