After outcry broke out about his performing at the 2012 Grammys, Brown decided that Twitter was the perfect place to argue with his opposition. He tweeted the following:
"HATE ALL U WANT BECUZ I GOT A GRAMMY Now! That's the ultimate FUCK OFF!"
So, basically, what he's trying to say is that the severe beating he gave Rihanna isn't a big deal anymore, because he's got a Grammy. Winning a Grammy wiped his slate clean. He no longer did anything wrong.
He's a crybaby who can't man up to his own bad behavior.