It started decades ago in Russia and Poland with vodka, migrated to Mexico with tequila, and now the uber-trendy bartenders of New York City have begun doing it with whiskey, as their "inside thing."

It's the Pickle Back, and it may be spreading to a bar near you...

Basically it's a shot of Jameson Irish Whiskey followed by a back of pickle juice. And those that have tried it (I have not. Yet...), swear by it. Something about the tart mixing with the smokiness of the whiskey.

The hip and trendy spots in NYC are even going as far as to mix up their own signature pickle juices. (Only the overall-wearing hayseeds in the flyover states would dare back with Vlassic...)

Will it last? I doubt it. But if you're looking for something different to try this St. Patrick's day... then some Pickle Backs to chase your whiskey shots will work. This year, at least.