Ground him for a week. No TV & Ipad.

It worked for my daughter. She screamed at me and her dad occasionally and I got really mad at it. I told her to either get spanked for 10 strokes or get grounded for a week. She chose to get spanked and she learned a hard lesson. Now she is more careful when she opens her mouth. Kid is smart. She knows we all love her and she is spoiled. She tricks us and abuses Mom and Dad's love. We need to stop her before it is going too far.