pickle back
n.— «We do something called a “pickle back”—a shot of Jameson with a shot of pickle-juice brine—that is quickly becoming a signature.» —“Jenn James of the Rusty Knot Never Wants to Hear ’Hotel California’ Again” New York May 28, 2008. (source: Double-Tongued Dictionary)
Further reading
Imagine telling someone how to get to your home, but without using the name of your street, or any other street within ten miles. Could you do it? We take street names for granted, but these words are useful for far more, like applying for a job or...
The word pickle is related to a similar-sounding Dutch word, pekel, meaning “brine.” In the 1400s, a pickle was a spicy sauce. Soon the word came to refer to the salty or acidic used to preserve foods, and later to the foods themselves...