Talk to the hand?

Has anyone out there heard of or used this expression?
My son came home from school last week and told me the bus driver told him to "talk to her hand". He didn't know what she meant. I didn't know what she meant. We asked my 21 yr. old son and He HAD heard of this sarcastic expression. I DON'T LIKE IT! I also DON'T LIKE that this obnoxious woman spoke to my kid this way.
For 24 years since I've lived in my home the bus stop for all our kids has always been right on our corner. This school year, the bus picks up my youngest at the usual stop, BUT she insists on not coming to this stop in the afternoon. She instead drops him off way down the street. I was on the phone with Richey, The head of transportation, many times in September to try to rectify this problem. I am usually quite tenacious, but speaking with Richey was like talking to a wall so I finally gave up, especially that J. never minded the long walk. So, last week we had down pouring, driving rain like I've never seen before. J. called me after school and I told him to ask the driver to please drop him off at his morning stop. He asked her politely and she said 'NO! I can't make exceptions.' He pointed out the rain and said' Please just this one time?' In a Nasty voice she said "talk to the hand". I called transportation again and the man I spoke with this time said to me " Talk to the hand? what does that mean"? haha (I had thought It was a younger generation saying but this guy sounded pretty young). SO, I explained that this means- my face is not hearing you, you will have as much luck talking to my hand-
Here we go again... I ALSO explained to him, our bus route, the mistake, the 24 years the same stop, the 2 different buses that come in the morning, the mixups, the frustration,The constant nastiness of the driver, the long walk, The worry of him walking alone, How incredibly patient I've been, EVERYTHING!!!"
His answer to all my lamenting? 'you need to TALK TO RICHEY, but he is on vacation right now.' He may as well have said "Talk to the hand"
Can you feel my frustration?