Shysters are people who are dishonest, especially in business or law.
Shysters are not good people because they lie and cheat others.
Examples:
The shysters tried to sell me a broken computer.
We should be careful of shysters who want to take our money.
The shysters at the company lied about the product's quality.
The shysters promised a lot, but they didn't do anything.
The shysters took all the money and ran away.
The shysters are not welcome in our town.