an illegal saloon or tavern, especially one operated during the American Prohibition period in the 1920s(Usage notes: Connotations of a classy establishment—some required coat and tie—compared with a more downmarket "blind pig" or 'blind tiger. Example • Retuning to Gotham, he came to intimately know Manhattan's speakeasy scene. “At a speakeasy,” Hirschfeld acknowledged, “you had to be known to get in...each place had its own clientele.” Membership cards, really fake IDs, were common.wiktionary.org)