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Scofflaw (n): A person who routinely flouts laws, rules, conventions, or accepted practices.
Origin: "Scofflaw" is an invented word which came from a 1924 national contest during Prohibition to coin a word that characterized a person who drinks illegally. "Scofflaw" was the winning entry chosen from more than 25,000 different contestant submissions. The $200 winning prize was split between two contenders who sent in the same word separately: Henry Irving Dale and Miss Kate L. Butler.