I feel like beating up my lame and childish younger brother?

He is so dam lame. and childish. and immature too. i cant stand him. he was talking on the phone... and its like he is telling his friends which is also my friends about his pocket money. he cant even use his brains to think why money issues or just anything about family money should be kept as a secret or discreet. so he was talking like this "Sigh... today my father did not give me any pocket money. now no money how to eat?" and i was like SHUT THE FK UP! i mean like... you did not recieve pocket money... but is there a need to tell him? and i dont mind if he just tell his friends. but he is also telling friends which is my friends that i meet in school almost everyday. and after the call i told him what not to do. and he was like "is this even your business?" then i told him the person he just called was also my friend so he will know" and my brother is so immature that he said " No that was my friend gerald" and gerald is actually also my friend and we meet almost every CCA session... so thats like 3 days a week? and also... he have a really nerd hairstyle. and... he is nerd... and he also laugh at stupid things. how stupid? VERY STUPID THINGS... and his face is just like a dickface which is so dam annoying. okay i think i am gonna bash him up after CCA today. he is gonna be dead.