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forum shopping

n. (context legal English) Attempting to file a lawsuit in (or have it transferred to) the jurisdiction most favorable to the party filing the suit.

Wikipedia
Forum shopping

Forum shopping is the informal name given to the practice adopted by some litigants to have their legal case heard in the court thought most likely to provide a favorable judgment. Some jurisdictions have, for example, become known as "plaintiff-friendly" and so have attracted litigation even when there is little or no connection between the legal issues and the jurisdiction in which they are to be litigated.

Examples include the attraction of foreign litigants to the United States due to its expansive acceptance of personal jurisdiction and favorable litigation climate, and the United Kingdom for its stricter defamation laws and generous divorce settlements.

The term has become adopted in a wider context for the activity of repeatedly seeking a venue or willing listener for a concern, complaint or action, until one is found.