shyster

A shyster is someone who might rip you off or do something unethical in order to get his way.

A used car salesman might tell you a car is a thousand dollars, but when you read the fine print, it turns out you’ll pay a lot more. That salesman is a shyster — someone who lies and deceives for his own benefit. The word comes from the German Scheisser, which is a vulgar term for “worthless person.” Although it contains the word shy, it actually sounds more like heist, which makes sense, since shysters are basically trying to rob you.

Definitions of shyster
1

n a person (especially a lawyer or politician) who uses unscrupulous or unethical methods

Synonyms:
pettifogger
Type of:
offender, wrongdoer
a person who transgresses moral or civil law