The basic motion is a forehanded sidearm movement.
From the en.wikipedia.org
Rompollo, a forehanded fellow, had been collecting photographs of Mrs. Carter ever since the election in order to get a feel for her style.
From the time.com
A forehanded ABC crewman was in the right place with a hand-held camera to watch him agonizingly line up and then blow his desperation third shot-and with it any chance for the top prize.
From the time.com
The second-year center raced to the net, stopped a crafty backhanded pass from Semin with his hip, then, in a single fluid motion, forehanded it past Biron, who also finished with 33 saves.
From the washingtonpost.com
More examples
Forehand(a): (of racket strokes) made with palm facing direction of stroke