My mother also has problems with alcoholism. I recall them being drunk almost 24/7 when I got back from bootcamp. I didn't really understand what was happening at first because I never knew my parents were the kind of people who could get drunk, and I thought that their strange aggressive behavior was my fault for being a stuffty kid.
Later on I realized that it was in-fact the alcohol and that they were getting drunk starting around 2PM every single day since I left home for bootcamp. It quickly took roots in them and they're still recovering, but they constantly relapse. Like last night, my mother became intoxicated and I found it extremely aggravating to try and interact with her, before she passed out at 7PM for the rest of the night and couldn't remember a thing in the morning.
The best thing to do when your parents are this drunk is to understand that they are intoxicated and there are chemicals in their bloodstream that will make them say stupid garbage that they don't really mean. Don't take what they say seriously, at this point their emotional intelligence and control is comparable to a frustrated 12 year old child. Be supportive, be considerate, be empathetic, try and understand what your mother is going through that makes her want to drink, and look for a long run solution, however, do defend yourself in the presence of physical violence. If the problem persists and you don't feel like you can control it on your own or you're being abused then contact the authorities. Do not hit her with a bat.