Backhand. surfers will understand this.
Some people stand up on a board with their left foot forward. These are called natural footers, those with their right foot forward are called goofy footers. sort of like left handed people have been called cackie handers. I started ride surfboards in the 60's and am a goofy footer. I prefer waves braking to the left ( when you look towards the shore). a right breaking wave to a goofy footer is a backhander.
The surfer in this painting is riding backhand. surfing backhanders is more difficult as you have your back to the face of the wave.