A pickle back! Pickle juice chaser with a shot of Jameson. i thought a pickle back was the most disgusting sounding thing until i tried it. it's a fantastic chaser for a shot of whiskey.
I ordered one once and the waiter didn't know what I was talking about so I just got a beer. He comes back later with a big smile on his face holding a glass with some liquid in it saying he brought me a pickleback. It was premixed. I shot it, it was a lot of liquid, and only once it was in my mouth did I realize they had used bread and butter pickle juice.