AITA for telling my 21yo brother he's a "big-backed loser"?
For several years, my older brother (21) had caused me (19f) many issues regarding one thing: food. Ever since I was little, he'd take the majority of the food set aside for both of us to eat and would even steal food off of my own plate if he wasn't satisfied. In recent years, he'd gotten significantly worse with this as my own appetite calmed down from being a teen. I don't eat as much at dinner when I or my mother cook and I put aside food for my lunches to take to college.
My brother has begun to get combative when I tell him to leave my food alone. He eats what I buy for myself and foods I was gifted by my mom or friends. He works part time, buys his own meals, and STILL takes my food and extras when I cook. He has been dragging his feet about getting into college, refuses to learn how to drive after my mother bought him a car in highschool, and just sits in his room all day playing video games. I'd had enough yesterday after he decided to eat McDonald's he'd ordered (3 burgers, 20pc nuggets and 2 large fries with a soda), the food I made for him with some extra of mine.. AND the food I put in the fridge for my lunch.
I shouted at him when I got back from walking my dog and told him he's a big-backed loser who refuses to get off his ass. My mother always excuses his behavior and said it was my fault for not labeling the lunchbox I'd bought myself and to be considerate of him growing (he's 5'3") and working. AITA?
Edit: what is going on with Judgement Bot, it's sent 70+ comments (・ロ・)°
Edit 2: My brother just asked me when I'm going to cook food tonight, told him I won't and he said he'll just order some because he wants a chicken sandwich. For further context, my brother used to also always get me into trouble when I was younger and my mom is convinced, to this day, that I'm a pathological liar because he points fingers at me so often. He also washes dishes in our home and will leave grease and soap on them as well as putting them in the wrong places to where when you open the cabinet they fall.
Last edit until I move out or fix ts: This morning, I cooked food. I gave him a plate because I felt bad. HE THREW OUT HALF OF IT and said "Well I don't want to be a big back 😒" dude. I told him I'm never cooking for him again and to learn to make his own damn food, he just said "fine." So I'm putting aside part of my paycheck each time to get a good egg to move out with, I'm putting my food that doesn't need to be refrigerated in a bag in my room so he won't see it at all.