A bar or dispensary where alcohol is served illegally. A word that was used during Prohibition where people were forbidden to drink alcohol, as it was against the law. People would often go high into the hills and brew Moonshine to give out at bars or on the street to earn money.
Canadian military slang dating back to World War I, for a mortar round or an aircraft 'iron' bomb, especially a heavy large-bore one. Derived from its weight and size, like a large pig.
"We were crossing the plain in open formationwhen the enemy brought smoke -- 'blind pigs' and rainmakers.