pound back slang
pound down slang

Then she pounded his back with a series of quick chops.

Half the people in the church came running forward to pound his back and shake his hand.

"Then take her in," Brown said, Pounding the pilot's back.

He bent over and she pounded his back with both her fists.

The big, black woman who'd pounded his back had been left to rot like a beached whale.

She pounded his back with her fists, much as he was pounding the door, until he stopped and looked around.

Martha pounded Buzzard's back with the flat of her hand.

I grabbed the hair of the midsized one while the other two pounded my back.

Richie took Ben into his arms and pounded his back.

Stoner pounded the Russian's back with both hands and got the same treatment in return.