What would be the best reply?

I have a so-called son~n~law to be. He is the biggest smart $%&* jerk you could ever imagine. Every time some one tells him ANYTHING, his response is always, "is that all you care about? I think we have bigger problems to worry about." I already know that what he REALLY means is that he refuses to be told anything and that HE doesn't care about ANYTHING. I am looking for an appropriate response to reply back to him with one that is both being a real smart a** that will really just p%$#@ him off royally and yet intelligent enough that his little smart a&% can't respond to. He's extremely forgetful and can't do anything except (PlayStation). But, on the spur of the moment, he can spit out some of the dumbest smart alic crap. I need a really good short response to reply with so that it will just kill it rite then n there, cuz if not, he will continue, and continue with crap. It doesn't matter if he is wrong or not. He will argue that (the red apple is blue. I win! You will never win! NEXT!) Like it was a contest. Anybody have any suggestions?