barbary coast

(noun) a part of a city that is notorious for gambling dens and brothels and saloons and riotous night life (especially the waterfront of San Francisco after the gold rush of 1849). Synonyms: Barbary Coast. Example: "We'll tolerate no barbary coast in this city!."

(noun) the Mediterranean coast of northern Africa that was famous for its Moorish pirates. Synonyms: Barbary Coast.