What about slightly fermented pineapple juice?
It was a W.C. Fields joke, in response to mylife's photo of Fields in #33. After I posted it I realized that very few people would understand.
From here:
On movie sets, Fields kept handy a vacuum flask of mixed martinis, which he referred to as his "pineapple juice". One day a prankster switched the contents of the flask, filling it with actual pineapple juice. Upon discovering the prank, Fields was heard to yell, "Who put pineapple juice in my pineapple juice?!"