The most obvious thing that comes to me is to sarge where your bro isn't. Find out where hes hanging out that night and don't go there. Or if you can't do that for whatever reason, maybe confront him at home and talk about it... you are brothers after all. He has two years practice on you, chances are he's going to out game you 9 times out of 10. Pick your battles.
But if your looking to shut him down, or just other want to be AMOGs in general Tyler Durden has some very interesting/ effective tactics. Check them out here:
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Mildawg