"unscrupulous lawyer," 1843, U.S. slang, probably altered from Ger. Scheisser "incompetent worthless person," from Scheisse "shit," from O.H.G. skizzan "to defecate" (see shit).
n. an unethical or unscrupulous lawyer. (Also a rude term of address.) : Look, you cheap shyster, I paid you to help me, not ruin me!
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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