Slang a person, esp. a lawyer, who uses unethical or tricky methods; pettifogger
Origin of shysterearlier shuyster, probably altered (? after barrister) from German scheisser, defecator
An unethical, unscrupulous practitioner, especially of law.
Origin of shysterProbably alteration of German Scheisser son of a bitch, bastard from scheissen to defecate from Middle High German schīzen from Old High German skīzzan ; see skei- in Indo-European roots.
The origin is mostly likely from German ScheiÃŸer (“incompetent worthless person"), from scheiÃŸen (“to defecate"), probably influenced by -ster