My mom is really mad at me, and i don't know what to do?

[lolololashley]

Okay. so today on twitter i was ticked off at my mom after she said some things about my brother's wife, so i said this: "Out of all the people i know who talk shit, my mom does it the most. That's sad" And i said it because it's true. I could explain and explain on here, but idk if any of you can understand how mean my mom can be. She talks about everyone, calls them fat ugly, talks about their situation and not only to me. Me and my mom doesn't have the greatest relationship. i mean yeah i love her. but we fight almost every day. i hate even typing about this because it's too hard to not cry. She's just negative energy through and through, and is the reason i'm struggling with keeping my weight down, because she always talks about that too. but anyway, yeah i said that about her on twitter, and she saw it because i accidentally forgot to sign off. i said it because i have no where else to go to vent. i have no one to talk to. and i have so much pent up anger about what she says to me about how i look, and about others. I don't know what to say. should i say "sorry i said that about you mom but it's true." ? Ugh i just don't know what to do. please help :/ and don't say that i should be nicer to my mom, just don't. you obviously can't tell what kind of person she is from here. me and my siblings can see it, but she can't, she never will. sorry i'm making this so long i just felt like i had to explain why i said it.