A pickleback is a type of shot wherein a shot of liquor is chased by a shot of pickle brine; the term "pickleback" may also refer only to the shot of pickle brine itself. Alternatively, the shot can be chased by a bite of a pickle. From Wikipedia
Savory, tangy brine defines pickle martinis at bars like The Penrose, with recent limited-time drinks at Popeyes and Sonic showing its mainstream reach.
