What is "pickleback"

A pickleback is a type of shot wherein a shot of whiskey 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 of whiskey can be chased by a bite of a pickle (generally, a whole dill pickle). The pickle brine works to neutralize both the taste of the whiskey and the burn of the ethyl alcohol.