Litigious

litigious adj. referring to a person who constantly brings or prolongs legal actions, particularly when the legal maneuvers are unnecessary or unfounded. Such persons often enjoy legal battles, controversy, the courtroom, the spotlight, use the courts to punish enemies, seek profit, and pursue minor matters which do not deserve judicial attention. Some of these people are called "professional plaintiffs."

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LITIGIOUS. That which is the subject of a suit or action; that which is contested in a court of justice. In another sense, litigious signifies a disposition to sue; a fondness for litigation.