Shyster
/ˈʃaɪs.tə(ɹ)/
noun
Someone who acts in a disreputable, unethical, or unscrupulous way, especially in the practice of law and politics.
Synonyms: pettifogger
verb
To act in a disreputable, unethical, or unscrupulous way, especially in the practice of law and politics.
To exploit (someone or something) in this way.