WordReference Random House Unabridged Dictionary of American English © 2020
Barbary Coast, 
  1. Place Namesthe Mediterranean coastline of the former Barbary States: former pirate refuge.
  2. the waterfront district of San Francisco in the 19th century, notorious for its cheap bars and nightclubs, prostitutes, gambling houses, and high incidence of crime.

Collins Concise English Dictionary © HarperCollins Publishers::
Barbary Coast n
  1. the Barbary Coasta historic name for the Mediterranean coast of North Africa: a centre of piracy against European shipping from the 16th to the 19th centuries
'Barbary Coast' also found in these entries (note: many are not synonyms or translations):
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