Shyster is derived from the German term scheisser, meaning literally “one who defecates,” from the verb scheissen, “to defecate,” with the English suffix -ster, “one who does,” substituted for the German suffix -er, meaning the same
thing.
Generally used to describe someone who is untrustworthy,
money grabbing and full of crap, particularly in the field of
legal work for some reason.