what should i do? Im scared?

my brother has always been abusive to me whenever i called him a name.
im not talking a little shove, he would kick me and puunch me,
today i was on the computer and he came in and started playing piano , i started singing out loud cause i know it annoys him. after that i went into the kitchen and started making soup.
he randomly started charging at me and grabbed me by my neck kicked my arm when i fell and threw me outside
after about 5 hours of being stuck in the back garden my mom finally came home
she didnt believe a word i said! he told her that i was kicking him and pulling his hair and that i punched myself!!
now im in my room and have baracaded the door and im absulotely starving!
its 5 o clock and all ive had so far today was a bowl of cereal at 9 in the morning
im too afraid to walk to the kitchen because he said that hell put me outside again and hell punch me again
my mom doesnt care
im 13 (and a girl and hes a 15 year old boy.)
please help!
i dont have time to talk to a teacher or anything i just need a plan, maybe somehting to trick him or some self defence! thanks x i really need help!
oh and i have really low blood pressure and am feeling dizzy

Stand up to him and let him know what an absolute terrible person he is and he will never succeed at life
MWAHAHAHA

when he is going to hit you, call the police(this should scare him from doing something stupid or even make him stop).
you can leave him alone, dont make comments to what he says, does and pretend like he is invisible.
this can make him want to talk to you nicely.
if you want physical revenge, lure him into a trap( run through a doorway with a friend weilding a bat hits him.)
you can go to a guidance counselor.
or u can find something he is embarrassed of and show it to his friends.