Blind pig is a term commonly used to refer to an establishment that illegally serves alcohol. However, there are several other synonyms used to describe such places. One popular term is "speakeasy", which was coined during the prohibition era in the United States when alcohol sales were banned. Other synonyms include "gin mill", "dive bar", "clip joint", and "juice joint". These terms were often used to describe establishments that operated outside of the law and served alcohol to customers covertly. Although these words have different origins, they all convey a sense of illegal activity and an air of secrecy that was necessary to avoid detection by law enforcement.