IIN to want to kill my brother?

You really shouldn't be "working on the corner" at your age, you know. You could get some really bad STD's. I really don't understand what witches have to do with your brother, though; does he practice gay witchcraft? Shouldn't you call him a warlock, instead of a witch? Why get so angry about him "pants me" in front of others; is your wee wee that tiny and embarrassing?
Get a grip, all siblings pick on each other! Consider it character building and buck up. Killing him won't stop your being picked on; there will be much bigger and badder guys where you will end up (in jail).