Many forms of Martial Arts have techniques involving grappling and throws, and "over the shoulder" throws are not exclusive to any one style. Specifically, styles such as Judo, Jujitsu, or Aikido are specifically geared towards these kinds of maneuvers. For more information, it is best to contact a martial arts class or association in your area.
Throw a pinch over your left shoulder using your right hand.
If you have supersticions, you throw salt over your shoulder to get rid of them
The right shoulder
over your right shoulder with your left hand
You throw salt on your left shoulder.
over the left shoulder
From the left