It is believed the "devil" stands over the left shoulder of a person. As salt was once considered a symbol of wealth and prosperity, spilling it is thought of as wasteful and a means to tempt the "devil" into taking it from you. Throwing salt over your left shoulder is supposed to "blind the devil" into not seeing the opportunity to reduce your material wealth.
over the left shoulder
Nothing its a stupid superstition
Of course not. It's all superstition. In fact, according to the superstition, throwing salt over your shoulder counteracts other things that bring bad luck supposedly, like breaking a mirror or spilling salt.
The superstition of Throwing salt over your left shoulder after spilling some applies to, apparently a devil is sitting on your left shoulder, and the force of the tiny salt particles knocks him off and he lands in a little heap on the floor. Then you should stamp on him. Do not throw it over your right shoulder as this is where your guardian angel is supposed to sit. This superstition is believed to come from the middle ages.
Throwing salt over your left shoulder is a common superstition believed to help ward off evil spirits or bad luck. This practice is often associated with spilling salt, as salt was historically considered a valuable and protective substance.
The superstition of throwing salt over your (left) shoulder came about because people once believed the Devil stood behind your left shoulder waiting for you to make a mistake or to influence you into making a mistake. Spilling salt, which was once used as part of a Roman soldier's salary and hence as money was believed to not only be wasteful, but bad luck. Throwing some of the spilled salt over your left shoulder would be throwing it into the Devil's eyes, thus blinding him to your mistake.
Throwing salt over the shoulder is a superstition believed to ward off evil spirits or bad luck. It is thought that spilling salt brings bad luck, so throwing it over the shoulder is a way to counteract this belief.
You then have salt on the floor. The myth is that if you spill salt, you have to throw some over your left shoulder or you will have bad luck. Although it is just a myth, many people who don't consider themselves superstitious do it anyway, "just in case".
Traditionally, if one is superstitious and spills salt, they should throw a pinch of salt over their left shoulder to ward off bad luck or evil spirits. This superstition comes from the belief that the devil tends to linger over one's left shoulder.
The superstition of throwing spilt salt over the shoulder is believed to ward off bad luck. It is thought to have originated from the idea that salt was a precious commodity and wasting it could anger evil spirits that might be nearby. By throwing salt over the left shoulder, one is believed to blind the evil spirits waiting there.
If you have supersticions, you throw salt over your shoulder to get rid of them
Lots of superstitious people, when they spill salt, will take a pinch of it in their right hand and throw it backwards over their left shoulder. Superstition has it that, at all times, a devil waits over your left shoulder, and also that spilling salt is bad luck (perhaps because it used to be rare and precious). Hence, you can mitigate your bad luck by throwing salt into the eyes of the devil. There's also a belief that your guardian angel (who can be found over your right shoulder) spills salt to warn you of evil nearby. Either you throw the salt to hurt the devil or, as salt was valuable, as an offering to placate him. Like lots of other superstitions in a Christianized culture, it has a Christianized explanation: spilling salt is bad luck, because Judas spilled salt at the Last Supper. This is somewhat equivalent to the Christianized explanation for not sitting down thirteen at the table, and almost certainly a red herring.