types:
bad egg
(old-fashioned slang) a bad person
decadent
a person who has fallen into a decadent state (morally or artistically)
panderer
a person who serves or caters to the vulgar passions or plans of others (especially in order to make money)
defiler,
polluter
a person or organization that causes pollution of the environment
scalawag,
scallywag
a white Southerner who supported Reconstruction policies after the American Civil War (usually for self-interest)
seducer
a bad person who entices others into error or wrongdoing
trampler
someone who injures by trampling
convict
a person who has been convicted of a criminal offense
gigolo
a man who has sex with and is supported by a woman
ganef,
ganof,
gonif,
goniff
(Yiddish) a thief or dishonest person or scoundrel (often used as a general term of abuse)
transgressor
someone who transgresses; someone who violates a law or command
molester
someone who subjects others to unwanted or improper sexual activities
principal
(criminal law) any person involved in a criminal offense, regardless of whether the person profits from such involvement
shark
a person who is ruthless and greedy and dishonest
pettifogger,
shyster
a person (especially a lawyer or politician) who uses unscrupulous or unethical methods
supplanter,
usurper
one who wrongfully or illegally seizes and holds the place of another
vandal
someone who willfully destroys or defaces property
debaucher
someone who assaults others sexually
war criminal
an offender who violates international law during times of war