T.F.
Don't respond.
I am in K and 1st grade a lot and we get some real doozy whiners. We just tell them to go back to their desk and when they can speak in a First grade voice come back and try again.
My now 18 yr old was a whiner when she was little. I had a phrase I used EVERY time she whined... it was.. "Wendy Whiner go away, come again another day". Sometimes I felt like she would believe her name was Wendy because I said that so much for what felt like so long.
Long story short, she is 18.5 now, headed to college and if I say the word "Wendy" she knows EXACTLY what I am talking about. It is a laugh now but back then it was awful.